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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
The pattern followed is 6 7=137 9=16So,8 4=12

Ans 2:

Class : Class 5
option B

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Subject :NSO    Class : Class 8

Air pollutants are harmful to living things. Which of the following is/are their harmful effect(s)?
(i) They form acid rain.
(ii) They cause breathing problems in humans.
(iii) They interfere with photosynthesis in plants.
(iv) They result in the depletion of ozone layer.

A (i) only
B (i) and (ii) only
C (i), (ii) and (iii) only
D (i), (ii), (iii) and (iv)


It is because acid rain is caused by sulphur dioxide and nitrogen dioxide. Breathing problems are caused by various kinds of pollutants. Dust particles interfere with photosynthesis in plants. Chloro-fluoro carbons or CFCs result in the depletion of ozone layer.

Ans 1:

Class : Class 8
i dont understand how ?

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
option b

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
C

Ans 2:

Class : Class 5
A IS THE ANSWER

Ans 3:

Class : Class 5
option A

Ans 4:

Class : Class 5
C

Ans 5:

Class : Class 5
C

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
The correct answer is A only.

Ans 2:

Class : Class 6
The correct answer is A

Ans 3:

Class : Class 3
A

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
The solution says that the answer is supposed to be d but according to the explanation given the answer seems to be a. Please explain.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Answer is option a as decomposition of dead matter of plant and animal by animals which gives nutrients to plants

Ans 2:

Class : Class 8
this question did not come in the question paper,when i was solving

Ans 3:

Class : Class 7
this question did not come in the question paper,when i was solving

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
C

Ans 2:

Class : Class 4
answer is c

Ans 3:

Class : Class 3

Ans 4:

Class : Class 4
B

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
B

Ans 2:

Class : Class 5
Single pulley does not provide any mechanical advantage, it only changes the direction of force while an inclined plane provides mechanical advantage. This means the efforts required to life the same amount of load on an inclined plane is lesser than that by a single pulley. (Pulley provides mechanical advantage only if we use more than one pulley).Lesser the inclination more is mechanical advantage and lesser the effort. That means the correct answer should be 'D'

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