Subject :NSO Class : Class 2
Subject :NSO Class : Class 3
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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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Subject :NSO Class : Class 9
Ans 2:
Class : Class 9
In the chromatogram, spots of the components of the protein extract are obtained at different heights, depending on their solubility. Only W and Y correspond to the two of the components of the extract (they are formed at the same height). Therefore, W and Y are components of the extract and the answer is C.
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 7
Match column I with column II and select the correct option from the codes given below.
| Column I | Column II |
| (P) Expansion of metals on heating | (i) Neither physical nor chemical change |
| (Q) A stone kept in the sunlight | (ii) Chemical change |
| (R) Burning of a candle | (iii) Combination of physical and chemical changes |
| (S) Curdling of milk | (iv) Physical change |
A (P) - (iv), (Q) - (i), (R) - (iii), (S) - (ii)
B (P) - (iv), (Q) - (iii), (R) - (ii), (S) - (i)
C (P) - (i), (Q) - (ii), (R) - (iii), (S) - (iv)
D (P) - (i), (Q) - (iv), (R) - (ii), (S) - (iii)
A IS THE CORRECT ANSWER BECAUSE CURDING OF MILK IS A CHEMICAL CHANGE
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 2