Subject :NSO Class : Class 2
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
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 3
