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60 Questions MCQ Test - KTET Paper 2: Science and Mathematics Test - 10
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KTET Paper 2: Science and Mathematics Test - 10 - Question 1
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Floor of a square room of side 10 m is to be completely covered with square tiles, each having length 50 cm. The smallest number of tiles needed is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 1
Calculation:
Area of square room
= (10)2 = 100 sq m = 100 × (100)2 sq cm
= 100 × 100 × 100 sq cm
Now, area of tile
= (50)2 = 50 × 50 sq cm
∴ Number of tiles needed
= Area of square room/Area of tile
KTET Paper 2: Science and Mathematics Test - 10 - Question 2
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You have given three different tasks to three groups in your classroom -
Group 1: Compare the given figures and find out which one occupies more area.
Group 2: Calculate the perimeter of the given shapes using a ruler.
Group 3: Find out how many steps you can take along the sides of the classroom walls by walking heel to toe.
On what basis have these groups most likely been created?
Group 1: Compare the given figures and find out which one occupies more area.
Group 2: Calculate the perimeter of the given shapes using a ruler.
Group 3: Find out how many steps you can take along the sides of the classroom walls by walking heel to toe.
On what basis have these groups most likely been created?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 2
Group teaching allows freedom for the students to interact freely and establish intimate contact with their teachers on the one hand and with peers on the other. A teacher intends to develop conflict resolution skills among his\her students. To realize this goal, the teacher can organize a variety of tasks.
- serves as an important tool to make learning meaningful by working together. In groups, students work collaboratively and involve in active learning. It provides an opportunity for the students to work together in an efficient way.
KTET Paper 2: Science and Mathematics Test - 10 - Question 3
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Aditi wanted to send a secret message to her friend. She gave her friend a letter which did not seems to have anything written on it. She asked her friend to rub the paper with a slice of beet root and the message appeared in dark red colour. Which of the following could she have used to write the message?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 3
Indicator:
- The indicator is a substance that shows different colors in acidic and basic solution
- Beetroot juice is a pH indicator.
- Baking soda solution is basic and beetroot is an indicator.
- Baking soda reacts with beetroot juice then, the secret message becomes visible. Hence, option 3 is correct.
- Whereas, common salt is an ionic compound and is neutral. So, it does not react with beetroot.
- Glucose is a simple sugar. So, it does not react with beetroot.
- Lemon juice is an olfactory indicator.
- Since beetroot is an indicator and turns red in an acidic medium whereas lemon contains citric acid which also turns red in an acidic medium. So, it does not react with beetroot.
KTET Paper 2: Science and Mathematics Test - 10 - Question 4
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If a = 
, then the value of 'a' is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 4
a = ((2013)2 + 2013 + 2014)1/2
= ((2013)2 + 2013 + 2013 + 1)1/2
= ((2013)2 + 2 x 2013 x 1 + 12)1/2
= ((2013 + 1)2)1/2
= ((2014)2)1/2 = 2014
Thus, option (4) is correct.
KTET Paper 2: Science and Mathematics Test - 10 - Question 5
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A student puts a drop of dilute solution of sodium hydroxide first on a blue litmus paper and then on a red litmus paper. He would observe that
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 5
As sodium hydroxide is basic in nature, it will turn red litmus paper blue while it has no effect on blue litmus paper.
KTET Paper 2: Science and Mathematics Test - 10 - Question 6
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If a cone and a sphere have equal radii and equal volumes, then the ratio between the diameter of the sphere and height of the cone is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 6
KTET Paper 2: Science and Mathematics Test - 10 - Question 7
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If the circumference of a circle is 3 cm, then its area, in cm2, is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 7
KTET Paper 2: Science and Mathematics Test - 10 - Question 8
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Radiation exposure is measured by which of the following units?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 8
The radiation dose absorbed by a person (that is, the amount of energy deposited in human tissue by radiation) is measured using the conventional unit 'rad' or the SI unit 'gray (Gy)'. The biological risk of exposure to radiation is measured using the conventional unit 'rem' or the SI unit 'Sievert (Sv)'.
KTET Paper 2: Science and Mathematics Test - 10 - Question 9
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Consider the following sets of reproductive terms:
(A) Sperm, oviduct, egg, uterus
(B) Ovulation, egg, oviduct, uterus
(C) Sperm, testis, sperm duct, penis
(D) Mensuration, egg, oviduct, uterus
The sets of correct combination are
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 9
Ovulation, egg, oviduct, and uterus correspond to female reproductive system.
Sperm, testis, sperm duct, and penis correspond to male reproductive system.
KTET Paper 2: Science and Mathematics Test - 10 - Question 10
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If a man sold an article for Rs. 5394 at a loss of 7%. What is the cost price of the article?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 10
Loss % = 7%
⇒ 7/100
Here C.P = 100 units
S.P = (100 - 7)
⇒ 93 units
According to the question,
93 units = Rs. 5394
⇒ 1 unit = Rs. 58
⇒ 100 units = Rs. 5800
∴ The cost price of the article is Rs. 5800
Traditional Method:
Given:
S.P = Rs. 5394
L % = 7%
Formula Used:
C.P = S.P × {100/(100 - L %)}
Where C.P = Cost Price
S.P = Selling Price
L = Loss
Calculation:
C.P = S.P × {100/(100 - L %)}
⇒ 5394 × {100/(100 - 7)}
⇒ 5394 × (100/93)
⇒ 58 × 100
⇒ Rs. 5800
∴ The cost price of the article is Rs. 5800
KTET Paper 2: Science and Mathematics Test - 10 - Question 11
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Which of the following pairs of vitamin and disease is/are correctly matched?
1. Vitamin A: Rickets
2. Vitamin B: Beriberi
3. Vitamin C: Scurvy
Select the correct answer using the code given below:
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 11
KTET Paper 2: Science and Mathematics Test - 10 - Question 12
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Identify the correct statement.
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 12
Electric current is the flow of electric charges through a particular area of a conductor( a metallic wire) in unit time.
Electric current is mathematically expressed as:
- I=Q/t,
I= current, Q= net charge flowing across any cross-section of the conductor, and t= time
- For electric current to flow through a conductor, there should be a potential difference between two points in the conductor.
- The electric potential difference is the work done to move a unit charge from one point to another in an electric circuit. V=W/Q, where, V is the potential difference, W is work done, and Q is the amount of charge flowing through the conductor. The S.I. unit of electric potential difference is volt(V).
- According to Ohm's law, the electric potential difference across the ends of a wire in a given electric circuit is directly proportional to the current flowing through it.
- V=IR, as V is the potential difference, I is current, R is Resistance
Resistance:
It is the ability of a conductor to resist the flow of charges through it when part of an electric circuit. The S.I unit of resistance is the ohm(Ω ).
The resistance of a conductor depends upon the following factors.
- On the length of the conductor
- On the area of cross-section of the conductor
- Nature of the material or resistivity.
Resistivity is the property of a material by virtue of which it resists the flow of charges through it. The S.I unit of resistivity is Ω m.
KTET Paper 2: Science and Mathematics Test - 10 - Question 13
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The HCF of 1683, 2244 and 5049 is x. The sum of digits of x is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 13
Given:
The HCF of 1683, 2244 and 5049 is x.
Concept used:
HCF - The greatest number which divides each of the two or more numbers
Calculation:
⇒ 1683 = 3 × 3 × 11 × 17
⇒ 2244 = 2 × 2 × 3 × 11 × 17
⇒ 5049 = 3 × 3 × 3 × 11 × 17
The HCF = (3 × 11 × 17)
⇒ 561
So,
⇒ x = 561
Now,
The sum of digits of x = (5 + 6 + 1)
⇒ 12
∴ The required sum of digits of x is 12.
KTET Paper 2: Science and Mathematics Test - 10 - Question 14
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Substance X is used as window cleaner and is basic in nature, while Y is an acid found in grapes. Identify the substances X and Y.
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 14
Acid and Base
- X - Ammonium hydroxide, Y - Tartaric acid is the correct option.
- Ammonium hydroxide is used as a window cleaner.
- In grapes, tartaric acid is formed.
- Potassium hydroxide is used for making soaps.
- Oxalic acid is found in spinach.
KTET Paper 2: Science and Mathematics Test - 10 - Question 15
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A man, standing between two cliffs, claps his hands and starts hearing a series of echoes at intervals of one second. If the speed of sound in air is 340 ms-1, the distance between the cliffs is _______
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 15
Echo is the acoustical phenomena in which there occurs a repetition of sound which is caused by the reflection of sound waves from an obstacle is known as echo
- For in order to occur echo the distance between the obstacle and sound source must be 17.2 m.
KTET Paper 2: Science and Mathematics Test - 10 - Question 16
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If the present age of a father is 42 years and that of his son is 12 years, then what was the ratio of their ages two years ago?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 16
Age of father two years ago = 42 - 2 = 40 years
Age of son two years ago = 12 - 2 = 10 years
Ratio of ages of father and son = 40 : 10 = 4 : 1
KTET Paper 2: Science and Mathematics Test - 10 - Question 17
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If the energy available to the plants from the sun is 20,000 J, then what would be the energy available to the lion in the food chain, Plant → Dear → Lion?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 17
Lindemann (1942) put forth ten percent law for the transfer of energy from one trophic level to the next.Plants utilise sun energy for primary production and can store only 10% of the utilised energy as net production available for the herbivores. When the plants are consumed by animals, about 10% of the energy in the food is fixed into animal flesh which is available for the next trophic level (carnivores). When a carnivore consumes that animal, only about 10% of energy is fixed in its flesh for the higher level.
KTET Paper 2: Science and Mathematics Test - 10 - Question 18
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If you carefully dig a grass plant and observe its roots and leaves you will find that it has
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 18
A grass plant has fibrous roots and parallel venation.
Roots: All grasses have fibrous roots. These roots extend into the soil from base of the plant.
Leaves: Grass leaves have parallel venation. In this venation, veins run parallel to one another down the length of the leaf.
KTET Paper 2: Science and Mathematics Test - 10 - Question 19
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The product of two fractions is 14/15and their quotient is 35/24.The greater fraction is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 19
Let the two fractions be 'x' and 'y'.
xy = 14/15
x = 7/6
Putting the value of 'x' in xy = 14/15,the equation we get
So, y = y = 4/5
Comparing the values of x and y, we get the greater fraction is x = 7/6.
KTET Paper 2: Science and Mathematics Test - 10 - Question 20
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A body of mass 2 kg is thrown up vertically with a kinetic energy of 490 J. The height at which the kinetic energy of the body becomes half the initial value is (g = 9.8 m/s2)
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 20
KE = 1/2 mv2
490 = 1/2 x 2 x v2
v2 = 490 m/s
According to the law of conservation of energy,
mgh = 1/2 mv2
h = 25 m
Height at which KE becomes half = 25/2 = 12.5 m
KTET Paper 2: Science and Mathematics Test - 10 - Question 21
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If the diameter of the Earth becomes two times its present value and its mass remains unchanged, then the weight of an object on the surface of the Earth becomes/remains
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 21
g = GM/R2
W' = mg' ...(1)
g = GM/R'2
D' = 2D
R' = 2R
g' = GM/4R2
Putting the value of 'g' in equation (1), we get
W' = m x (GM/4R2) = mg/4 = W/4
KTET Paper 2: Science and Mathematics Test - 10 - Question 22
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First find the median of 36, 54, 77, 31, 48, 67, 25, 80, 45, 82, and 23.. If 82 is replaced with 89 and 31 is replaced with 33 in the data, then find the new median. What is the difference between the old median and the new median?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 22
Given:
The numbers = 36, 54, 77, 31, 48, 67, 25, 80, 45, 82, and 23
Concept used:
The following steps are helpful while applying the median formula for ungrouped data.
- Step 1: Arrange the data in ascending or descending order.
- Step 2: Secondly, count the total number of observations 'n'.
- Step 3: Check if the number of observations 'n' is even or odd.
When n is odd
Median = [(n + 1)/2]th term
When n is even
Median = [(n/2)th term + ((n/2) + 1)th term]/2
KTET Paper 2: Science and Mathematics Test - 10 - Question 23
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Which of the following is caused by friction?
I. Soles of shoes wear out
II. You feel heat when you rub your hands
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 23
Friction: Friction is an opposing force that comes into play when the body is actually moving (slide or roll) or even tries to move over the surface of another body.
The presence of irregularities between the two surfaces in contact causes friction.
Cause of Friction:
Friction is a evil because it cause of loss of energy and wear and tear of surfaces.
- Soles of shoes wear out
- We feel heat when we rub our hands.
- Lighting a matchstick
- Working of an eraser
- Coming down a Kid’s slide
- Holding onto objects
Hence we can conclude that Both I and II are the caused by friction.
KTET Paper 2: Science and Mathematics Test - 10 - Question 24
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The autotrophic mode of nutrition requires
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 24
Ecosystem:
- All organisms such as plants, animals, microorganisms, and human beings as well as the physical surroundings interact with each other and maintain a balance in nature.
- All the interacting organisms in an area together with the non-living constituents of the environment form an ecosystem.
Autotrophs are organisms that can produce their own food, using materials from inorganic sources by using basic energy sources such as sunlight.
- Plants are the main example of autotrophs, using photosynthesis.
- Some autotrophs, such as green plants and algae, are phototrophs, they convert electromagnetic energy from sunlight into chemical energy in the form of glucose. So, Spinach, Tomato, Banana are also examples of autotrophs.
Mode of Nutrition:
Autotropic: The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic (auto = self; trophos = nourishment) nutrition. Therefore, plants are called autotrophs. Ex- Plants, Tress, algae, etc.
Heterotrophic: Animals and most other organisms take in ready-made food prepared by the plants. They are called heterotrophs (heteros = other).
- Holozoic: Animals who take in solid food and breakdown it inside their body like animals, amoeba, etc. comes under the holozoic mode of nutrition.
- Parasitic: Parasites live inside or outside the other organism (host) and get their nutrition from the host. Ex - Ticks, Cuscuta (dodder), mosquito, etc.
- Saprophytic: In this mode of nutrition the organisms take in nutrients in solution form from dead and decaying matter is called saprotrophic nutrition. Ex- Fungi grows on pickles, leather, etc.
Hence,Carbon dioxide and water, sunlight, chlorophyll all are correct.
KTET Paper 2: Science and Mathematics Test - 10 - Question 25
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One bell rings for every 6 minutes. Another bell rings every 8 minutes. The third bell rings every 9 minutes. After how many minutes all the three bells will ring together?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 25
Given:
One bell rings every 6 minutes. Another bell rings every 8 minutes. The third bell rings every 9 minutes.
Concept used:
LCM is the smallest common multiple of two or more numbers.
Calculation:
Now, the three bells will ring together after
⇒ LCM (6, 8, 9)
⇒ 23 × 32
⇒ 8 × 9
⇒ 72 minutes
∴ The three bells will ring together after 72 minutes.
KTET Paper 2: Science and Mathematics Test - 10 - Question 26
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Match the columns.
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 26
The correct answer is i - d, ii - c, iii - b, iv - a
Plant Cell
- The cell wall in plant cells is made up of cellulose, a carbohydrate.
- The plant cell wall is an elaborate extracellular matrix that encloses each cell in a plant.
- It was the thick cell walls of cork, visible in a primitive microscope, that in 1663 enabled Robert Hooke to distinguish and name cells for the first time.
- The walls of neighboring plant cells, cemented together to form the intact plant, are generally thicker, stronger, and, most important of all, more rigid than the extracellular matrix produced by animal cells.
Animal Cell
- Desmosomes are one of the stronger cell-to-cell adhesion types and are found in tissue that experience intense mechanical stress, such as cardiac muscle tissue, bladder tissue, gastrointestinal mucosa, and epithelia.
- Animal cells simply have a cell membrane, but no cell wall.
Bacterial cell walls
- Bacterial cell walls are made of peptidoglycan also called as murein, which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids.
Fungal cell
- The cell wall is a characteristic structure of fungi and is composed mainly of glucans, chitin and glycoproteins.
KTET Paper 2: Science and Mathematics Test - 10 - Question 27
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The Planet that lies at the outermost orbit of the Solar System is:
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 27
- The Solar System's farthest planet known as Neptune is located eight planets from the Sun.
- It is the third-most massive, densest, and fourth-largest planet in the Solar System in terms of diameter.
- Its mass is 17 times that of the Earth.
- Being composed primarily of gases and liquids, it has no well-defined solid surface.
- The planet travels 30.1 astronomical units around the Sun on average during each of its 164.8-year cycles.
- It has the name of the sea god in Roman mythology.
KTET Paper 2: Science and Mathematics Test - 10 - Question 28
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A sum of money amounts to Rs. 4,818 after 3 years and Rs. 7,227 after 6 years on compound Interest. The sum is:
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 28
For 3 years, P(1 + R/100)3 = 4,818 ...(i)
For next 3 years, 4,818(1 + R/100)3 = 7,227 ...(ii)
Using value of (1 + R/100)3 from eq. (i) in eq. (ii) and solving for P, we get
P = Rs. 3,212
Rs. = 3,212
KTET Paper 2: Science and Mathematics Test - 10 - Question 29
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Which of the following acids is/are present in acid rain?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 29
In the gas phase, sulphur dioxide is oxidised by reaction with the hydroxyl radical via an intermolecular reaction:
SO2 + OH. → HOSO2·
which is followed by:
HOSO2· + O2 → HO2· + SO3
In the presence of water, sulphur trioxide (SO3) is converted rapidly into sulphuric acid:
SO3 (g) + H2O (l) → H2SO4 (aq)
Nitrogen dioxide reacts with OH to form nitric acid:
NO2 + OH· → HNO3
KTET Paper 2: Science and Mathematics Test - 10 - Question 30
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Which of the following pairs is related to the inheritance of characters?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 30
Heredity is a term that refers to traits and features that are inherited from one's parents and ancestors. At birth, a person inherits 50% of each parent's genetic material (genes) that are passed along through the chromosomes found in the DNA. DNA (deoxyribonucleic acid) is the cell's genetic material, contained in chromosomes within the cell nucleus and mitochondria. A chromosome contains many genes.
KTET Paper 2: Science and Mathematics Test - 10 - Question 31
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Which of the following orders is correct for teaching Mathematics by problem-solving method?
(i) Defining the problem
(ii) Identifying the problem
(iii) Collection of data
(iv) Experimentation
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 31
Option (2) represents the correct order as first we identify the problem, then define the problem, then collect data and in the last, we do experiment.
KTET Paper 2: Science and Mathematics Test - 10 - Question 32
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The section on 'activities and projects included in the exercises of NCERT Science textbooks for class Vlll' primarily aims at
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 32
The section on 'activities and projects included in the exercises of NCERT Science textbooks for class Vlll' primarily aims at assessing the students on practical skills. It will enhance their thinking skills.
KTET Paper 2: Science and Mathematics Test - 10 - Question 33
NCERT Science textbooks for upper primary classes include a large number of daily life related questions which have been left unanswered. This has been done so that
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 33
NCERT Science textbooks for upper primary classes include a large number of daily life related questions which have been left unanswered. This has been done so that the students can seek answer to these questions by exploring different resources. This will widen their horizons of knowledge.
KTET Paper 2: Science and Mathematics Test - 10 - Question 34
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You have given three different tasks to three groups in your classroom -
Group 1: Compare the given figures and find out which one occupies more area.
Group 2: Calculate the perimeter of the given shapes using a ruler.
Group 3: Find out how many steps you can take along the sides of the classroom walls by walking heel to toe.
On what basis have these groups most likely been created?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 34
Group teaching allows freedom for the students to interact freely and establish intimate contact with their teachers on the one hand and with peers on the other. A teacher intends to develop conflict resolution skills among his\her students. To realize this goal, the teacher can organize a variety of tasks.
- serves as an important tool to make learning meaningful by working together. In groups, students work collaboratively and involve in active learning. It provides an opportunity for the students to work together in an efficient way.
KTET Paper 2: Science and Mathematics Test - 10 - Question 35
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What is one method of transferring information from short-term to long-term memory?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 35
Recall of information is most often required in daily activities and especially in educational performances. Short-term memory and long-term memory can be differentiated by their levels of processing.
KTET Paper 2: Science and Mathematics Test - 10 - Question 36
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If the fractions
are arranged in ascending order, which one will be fourth place?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 36
Taking LCM of denominators 5, 8, 9, 13 and 11
LCM (5, 8, 9, 13 and 11) = 51480
2/5 × 51480 = 20592
3/8 × 51480 = 19305
4/9 × 51480 = 22880
5/13 × 51480 = 19800
6/11 × 51480 = 28080
In ascending order: 19305 < 19800 < 20592 < 22880 < 28080
∴ 4/9 will be at 4th place.
KTET Paper 2: Science and Mathematics Test - 10 - Question 37
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For which kind of problem in mathematics the method of analysis and synthesis is applied?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 37
Method of analysis and synthesis is applied for such problems in mathematics where ‘if-then’ type of logic is needed (If a triangle is isosceles, then prove that the measures of the angles opposite to the sides of equal length are equal). In such problems, some conditions (hypotheses) are given and under those conditions, some relationships have to be proved. In proving geometric relationships, and algebraic identities and in solving algebraic problems this method can be effectively used.
Synthetic Method: The word “synthetic’ is derived from the word ‘synthesis which means to combine. In this method, we combine several facts, perform certain mathematical operations, and arrive at the solution. In this method, we start with the known data and connect it with the unknown part.
It is the process of putting together known bits of information to reach the point where unknown information becomes obvious and true. Thus in this method, we proceed from hypothesis to conclusion.
It is lead from:
- Known to Unknown
- Hypothesis to Conclusion
- Concrete to Abstract
- Simple to Complex
The Analytical Method is a generic process combining the power of the Scientific Method with the use of a formal process to solve any type of problem. Analysis means breaking up into components.
- The use of the Analytical Method is critical to solving the sustainability problem because it appears that current processes are inadequate.
- They are intuitive, simple, and based on how activists approach everyday problems.
- All scientifically based problem-solving approaches use the analytical method.
- It leads from conclusion to hypothesis.
- It proceeds from unknown to known. (opposite of synthetic method)
Hence, we can conclude that If and then kind of problem in mathematics the method of analysis and synthesis is applied.
KTET Paper 2: Science and Mathematics Test - 10 - Question 38
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Which one of the following fuels has the maximum calorific value?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 38
We know that heat is produced when fuels are burnt. The amount of heat produced by burning or combustion of 1Kg of fuel is expressed in terms of calorific value.
- It is also known as energy value or heat of combustion.
- It is measured in units of energy per amount of material, e.g. KJ/g or kJ/kg, where KJ is Kilo Joules.
KTET Paper 2: Science and Mathematics Test - 10 - Question 39
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"Scientific knowledge is subject to change" This given statement gives which aspect of the nature of science?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 39
Science learners need to know not only facts/concepts but also about the processes through which this knowledge is generated. Aspects of Nature of Science:
- Scientific knowledge is long-lasting yet tentative, that is Scientific knowledge is subject to change because we make new observations and tend to reinterpret the existing observations.
- Empirical evidence is used to refine and support ideas in Science
- Social and historical factors play a role in the construction of scientific knowledge
- Laws and theories play a central role in developing scientific knowledge, yet they have different functions
- Accurate record-keeping, peer review, and replication of experiments help to validate scientific ideas
- Science is a creative endeavor
- Science and Technology are not the same, but they have an impact on each other.
Hence, it can be concluded that the statement "Scientific knowledge is subject to change" means Scientific knowledge is long-lasting yet tentative.
KTET Paper 2: Science and Mathematics Test - 10 - Question 40
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Chhaya simplified the given rational number
.
This error can be considered as
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 40
The student thought that the negative sign will still be there and not get divided.
KTET Paper 2: Science and Mathematics Test - 10 - Question 41
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Which of the following does not reflect the personality attribute of a person having scientific temper?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 41
Biased opinion does not reflect the personality attribute of a person having scientific temper.
KTET Paper 2: Science and Mathematics Test - 10 - Question 42
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To analyse the level of questions of a question paper of a Scholastic Achievement Test, useful indices for evaluation are
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 42
Difficulty index is a measure of the proportion of examinees who answered the item correctly; for this reason it is frequently called the p-value. Item discrimination is the degree to which students with high overall exam scores also got a particular item correct. These two indices are used in evaluation of questions in SAT.
KTET Paper 2: Science and Mathematics Test - 10 - Question 43
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Giving open-ended tasks in mathematics
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 43
School mathematics has to be in close relation to the social worlds of children where they are engaged in mathematical activities as a part of daily life.
KTET Paper 2: Science and Mathematics Test - 10 - Question 44
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Rusting of Iron is a ________
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 44
- Chemical change occurs when their is a change in the chemical properties of a matter.
- When 2 or more reactants react they produce a compund having a different chemical composition.
- When iron rusts it reacts with the oxygen and water in the air to form it's hydroxide.
- the brown coloured rust is the hydroxide of iron (Fe(OH)3).
- Reaction is - 4Fe + 3O2 + 6H2O → 4Fe(OH)3
KTET Paper 2: Science and Mathematics Test - 10 - Question 45
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In _______ all the cues provided by teacher while teaching, the deductive thinking where in abstract content is differentiated by the teacher giving appropriate examples to the students.
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 45
The expository Approach is also known as the Transmission Approach. In this approach, the teacher is communicating maximum information to the students in a minimum of time. This approach helps the teacher to
cover the content to be taught to the students. This approach is widely used across all subjects and different levels of education by the teacher. The main proponent of this method is David P. Ausubel.
In the expository approach all the cues provided by the teacher while teaching, the deductive thinking wherein abstract content is differentiated by the teacher giving appropriate examples to the students. The teaching Learning process is totally controlled by the teacher.
Note that:
- In Discovery Approach some cues in the form of learning material are presented by the teacher to the students and using Inductive thinking, the students are expected to discover the concept or the generalization/rule. Therefore the teaching-learning process is partially controlled by the teacher and students are also involved to a great extent.
- In an Inquiry approach, the students are given a problem or a discrepant event. The students will ask the teacher questions to collect the data and they through interaction find out a satisfactory solution to a given problem or explanation of the given discrepant event. In this approach, the teaching-learning process is totally controlled by the students.
KTET Paper 2: Science and Mathematics Test - 10 - Question 46
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Which is the most appropriate problem solving strategy in a constructivist Mathematics classroom?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 46
Constructivist teaching is based on the belief that the teacher facilitates a process of learning in which students are encouraged to be responsible and autonomous.
KTET Paper 2: Science and Mathematics Test - 10 - Question 47
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In order to enhance the self-esteem of students, they should be allowed to
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 47
In order to enhance the self-esteem of students, they should be allowed to take part in discussions and debates.
KTET Paper 2: Science and Mathematics Test - 10 - Question 48
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You have two test tubes 'A' and 'B'. Test tube 'A' contains paste of turmeric, whereas test tube 'B' contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents of
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 48
Being an acid, hydrochloric acid does not change the colour of turmeric indicator, as acids do not change the colour of turmeric indicator. Also, phenolphthalein indicator would remain colourless in acids.
KTET Paper 2: Science and Mathematics Test - 10 - Question 49
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Which of the following statements does not indicate a merit of lesson planning?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 49
Option (3) is not a merit of lesson planning. This is one of the merits of assessment. The formative and summative assessments help the teachers to know about the extent of knowledge gained by the student. The teacher can thus devise methods to improve her teaching methodology.
KTET Paper 2: Science and Mathematics Test - 10 - Question 50
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The information that need not be given in a laboratory instruction card is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 50
The information that need not be given in a laboratory instruction card is who has to do the experiment.
KTET Paper 2: Science and Mathematics Test - 10 - Question 51
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The project method has been developed based on certain principles. Which of the following is incorrect in terms of its principles?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 51
The project method attempts to allow the student to solve problems with as little teacher direction as possible. The teacher is seen more as a facilitator than being the one to deliver knowledge and information.
Students in a project method environment should be allowed to explore and experience their environment through their senses and, in a sense, direct their own learning by their individual interests. Very little is taught from textbooks and the emphasis is on experiential learning, rather than rote and memorisation. A project method classroom focuses on democracy and collaboration to solve 'purposeful' problems.
KTET Paper 2: Science and Mathematics Test - 10 - Question 52
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The objective of teaching number system to primary-stage students is to enable the students
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 52
Mathematics is the study of geometrical figures, their co-relation, and their dependency on each other. It deals with quantity, measurement, and spatial relationships.
- The teaching of mathematics should be done in a pre-defined order that is psychologically organized as per the needs of the students.
- According to National Curriculum Framework-2005, the main goal of Mathematics education in school is the mathematization of the child’s thought process.
KTET Paper 2: Science and Mathematics Test - 10 - Question 53
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What is immaterial for an fuse wire?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 53
- Its specific resistance: A material with higher resistance will heat up more quickly, leading to faster melting of the fuse in case of overcurrent.
- Its radius: A thinner wire (smaller radius) will heat up and melt faster than a thicker one for the same material and current, making the fuse more sensitive.
- Its length: A longer wire has more resistance than a shorter one (for the same material and cross-sectional area), and therefore it will heat up more quickly.
- Current flowing through it: The fuse is designed to melt (or "blow") when a certain current threshold is exceeded. This is the fundamental operating principle of a fuse.
- However, if we had to choose the least important factor from the ones you listed, it would be the length of the fuse wire.
- In practical applications, fuse wires are usually very short, so while the length does technically affect the resistance (and therefore the heating), its effect is likely to be much smaller compared to the other factors.
- Still, this doesn't mean length is completely immaterial; it's just potentially less critical in most cases.
KTET Paper 2: Science and Mathematics Test - 10 - Question 54
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Which of the following examples illustrates direct experience and knowledge?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 54
Direct experience is the type of experience that is gained by the active participation of an individual. Such types of experiences are only acquired by doing with own hands. For example, learning how to ride a bicycle requires a person to himself get on the saddle and start pedaling. Just by seeing others riding a cycle will not help.
KTET Paper 2: Science and Mathematics Test - 10 - Question 55
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The most effective teaching aid in Mathematics is
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 55
We make use of different sense organs while learning with teaching aids, so it is more effective learning. Teachers need to use teaching aids to teach Mathematics effectively. The most effective teaching aids are manipulative such as cubes, counters, pattern blocks, geoboards, place values blocks and plastic money, which are visual aids.
KTET Paper 2: Science and Mathematics Test - 10 - Question 56
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Anita prepared a fresh solution of sodium hydroxide in a test tube. She dropped a small piece of aluminium foil into it and then brought a burning matchstick near the mouth of the test tube. She heard a pop sound. The pop sound indicates the presence of
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 56
The 'pop' sound indicates the presence of hydrogen gas, as metals react with sodium hydroxide to produce hydrogen gas.
2Al + 2NaOH → 2NaAlO2 + H2↑
KTET Paper 2: Science and Mathematics Test - 10 - Question 57
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In Bloom's Taxonomy of Educational Objectives, the specification 'Translation' belongs to the objective
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 57
From the table of Revised Cognitive Domain:
Comprehension: Understand the meaning, translation, interpolation, and interpretation of instructions and problems, state a problem in one's own words.
KTET Paper 2: Science and Mathematics Test - 10 - Question 58
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Which of the following is/are the skill of micro-teaching in Mathematics?
i. the skill of integrating knowledge and experience
ii. the skill of facilitating child-centric learning
iii. the skill of developing observation in learners
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 58
Microteaching has been considered an effective technique for the development of teaching skills for teachers. The technique has been refined over a period of the last thirty years. Microteaching is like a simulation technique for developing teaching skills. This approach is used to shape the teacher's behavior based on an effective feedback mechanism.
KTET Paper 2: Science and Mathematics Test - 10 - Question 59
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Ginger is a stem because
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 59
- Ginger is a stem and not a root because it has nodes and internodes.
- It is a rhizome, an underground modification of the stem.
- The rhizome is a branched, prostrate, horizontally growing stem having nodes and internodes.
- It has a brownish line that represents nodes and internodes.
- It has scale leaves at nodes, axillary buds & a terminal bud.
- These leaves lack chlorophyll.
- The terminal bud gives rise to aerial shoot at the onset of a favourable condition.
- It grows above the ground & runs parallel to the ground.
- It helps the plant to propagate vegetatively.
- The nodes present in ginger give rise to both root & shoot.
- Underground modifications of stems:
- Underground stems are modified to store food inside them.
- It becomes thick & tuberous because of the storage of food.
- Various types of modifications are:
- Stem tuber: Potato.
- Bulb: Onion, Garlic, Tulips, Lilies, etc.
- Corm: Gladius, Sativus, etc.
- Rhizome: Ginger, Turmeric, Banana, Ferns, etc.
- Rhizome:
- The rhizome which grows with lateral buds is called a sympodial rhizome.
E.g: Ginger. - The rhizome which grows through terminal buds is called a monopodial rhizome.
E.g: Lotus.
KTET Paper 2: Science and Mathematics Test - 10 - Question 60
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To promote meaningful learning in a science classroom with diverse learners , which of the followings should be taken care by the teacher?
Detailed Solution for KTET Paper 2: Science and Mathematics Test - 10 - Question 60
Learning is a comprehensive process that refers to a change in behavior, knowledge, and skill as a result of practice and experience. It represents a progressive change in behavior.
- It is a life-long process. Learning is not inherited but can begin right from birth by providing constant interaction and stimulation received from the physical, social, and cultural environment and it does not stop till the end.
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