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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

Match column I with column II and choose the correct option from the codes given below.

Column I Column II
P. Hot tea poured in saucer gets cooled faster. (i) Evaporation increases with increase in temperature.
Q. We feel more cold after a hot water bath than a cold water bath. (ii) Evaporation increases with decrease in humidity.
R. Water is cool in earthen pitcher during dry hot day. (iii) Evaporation increases with increase in wind speed.
S. We feel comfortable under a moving fan in summer. (iv) Evaporation increases with increase in surface area.


A P - (ii), Q - (i), R - (iii), S - (iv)
B P - (iii), Q - (iv), R - (ii), S - (i)
C P - (iv), Q - (i), R - (ii), S - (iii)
D P - (iv), Q - (ii), R - (iii), S - (i)


given answer is wrong.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 9

Study the given flow chart and choose the correct statements.
Sulphur + Coal powder + Common salt

(i) The property used to separate the mixture is solubility of different components in different solvents.
(ii) Sulphur is soluble in carbon disulphide, salt in water and coal is insoluble in both.
(iii) X is water and Y is carbon disulphide.

A (i) and (ii) only
B (ii) and (iii) only
C (i) and (iii) only
D All are correct.


its only 2 and 31 refers to chromatography

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
c

Ans 2:

Class : Class 3
A

Ans 3:

Class : Class 3
A

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Subject :NSO    Class : Class 9

Select the incorrect differences between collenchyma and sclerenchyma.

Collenchyma Sclerenchyma
(i) It is made up of dead cells. Its cells are living.
(ii) Lumen or cell cavity is wide. Lumen or cell cavity is usually narrow.
(iii) It provides hardness to the region where it occurs. It keeps the organ soft.
(iv) Wall thickening is not uniform. Wall thickening is uniform.
(v) Pits are simple and straight. Pits are simple, oblique and may be branched.


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


I think correct answer is b. But SOF is saying it is c.

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Subject :NSO    Class : Class 2

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