Question

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Answer 1

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22-- A. Sodium hydrogen carbonate B is sodium carbonate C is Carbon dioxide .
23-- There will be a reaction in test tube1 as aluminium is more reactive than iron which then displaces iron to form aluminium sulphate .

In test tube2 there will be no any reaction . This is because copper is more reactive than iron as a result iron cannot displace it.

24-- The female gametes will also have. 24 chromosomes.but in zygote the no. of chromosomes will be 24×2= 48.

25-- Take a test tube . Add calcium oxide and then water , it will the react to form calcium hydroxide now take a straw,put one side on the test tube and blow air from your mouth . U will find that it will get converted in calcium carbonate which is a white precipitate .
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