Question

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Answer 1

Answer:

ANS 3:-

2KOH + CaSO4---------- K2SO4 + H2O

I AM NOT SURE FOR THIS ANSWER ^

2Fe + 3O2 ------- Fe2O3

ANS 4 :-

REACTION IN WHICH ONE REACTANT IS BREAK DOWN TO FORM SIMPLER PRODUCT IS KNOWN AS DECOMPPSITION REACTION.

EG:- ON HEAT :-

CaCO3 ------- CaO + CO2

ANS 5 :-

WHEN IRON NAIL IS DIPPED IN COPPER SULPHATE SOLITION A LAYER OF COPPER FORMED ON THE NAIL

EQUATION :-

Fe + CuSO4 --------- FeSO4 + Cu

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