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All India-2012
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Q25 of 56 Page 1

The aqueous 'solutions of copper 'sulphate and zinc sulphate appear

The solution of Copper sulphate is Blue in color and that of Zinc sulphate is colorless because zinc is more reactive than copper and displaces copper from copper sulphate solution.

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23

Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing the process of germination of pollen grains on stigma and label the following parts:

(i) Female germ cell


(ii) Male germ cell


(iii) Ovary

24

Draw a diagram of human female reproductive system and label the part

(i) that produces eggs.


(ii) where fusion of egg and sperm takes place.


(iii) where zygote is implanted.


What happens to human egg when it is not fertilized?

26

On adding acetic acid to sodium hydrogen carbonate in a test tube, a student observes

27

Which one of the following are the correct observations about acetic acid?

Questions · 56
All India-2012
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