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Subject :NSO    Class : Class 7

Besides the arrangement as shown in the given set-up, what other arrangements must be made to test for the presence of starch in the leaves X and Y ?


A The plant should be destarched first and then used for the experiment.
B The plant should be placed in continuous light for 2-3 days prior to experiment.
C On leaf Y, iodine solution should be put on while leaf X should be used as control without iodine application.
D None of these


I suppose it should be placed in dark for destarching and then in sunlight for testing whether the plant can perform photosynthesis in absence of CO2..

Ans 1:

Class : Class 8
option b

Ans 2:

Class : Class 8
option b

Ans 3:

Class : Class 8
option b

Ans 4:

Class : Class 5

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 3
all the questions answer is b

Ans 3:

Class : Class 3
b

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
d is correct answer

Ans 2:

Class : Class 5
D is the answer

Ans 3:

Class : Class 5

Ans 4:

Class : Class 7

Ans 5:

Class : Class 7
DDDDDDDDDDDDDDDDDD

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5
D

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Subject :NSO    Class : Class 5

Refer to the given figure and select the incorrect statement.

(i) S is the coloured circular part of the eye.
(ii) P is the outermost part of eye and it maintains the shape of the eyeball.
(iii) Q is a layer of light sensitive receptors at the back of the eye.
(iv) R carries message from eye to brain.
(v) T is the folded skin above eye which protects eye from dust, durt, etc.

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


Ans 1:

Class : Class 5
please explain

Ans 2:

Class : Class 5
tough one,i think the explanation is:S is lens and that part is not colored and t is either eye lids or cornea and neither of them is folded skin.acoording to me

Ans 3:

Class : Class 4
wrong answer

Ans 4:

Class : Class 6

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
both answers b and c are not advisable

Ans 4:

Class : Class 6

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6
After unscrambling the four jumbled words. We get, Sedimentation, Chlorination, Distillation and Filtration. Filtration and Sedimentation are methods of removing insoluble impurities. Distillation is the only option that is used to remove soluble impurities.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
i.e. 6 plus 7 = 13 and 9 plus 7 = 16 . SO, 8 plus 4 is 12.

Ans 2:

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

Ans 3:

Class : Class 6
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
Please explain

Ans 2:

Class : Class 9
i dont understand how ?

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
option b

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