Question

State the reason why ?

i. carbon is not used to reduce the oxides of sodium or aluminium.

ii. an iron strip is dipped in a blue copper sulphate solution turns the blue solution pale green.

iii. metals replace hydrogen from acids whereas non-metals do not.

iv. calcium does not occur free in nature.

v. zinc is used in the galvanisation of iron and not the copper.​

Answer 1

1)bcoz carbon is less reactive than sodium and aluminum

2)blue solution is the copper sulphate .When iron is putted in it,then ,it takes place of copper and form ironsulohate.Due to this,that change occur

3)bcoz ,metals are electropositive like hydrogen.

4) bcoz ,it is highly reactive

5)it acts as a protective layer,and prevent it on and copper from rusting

Answer 2

Explanation:

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