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1)

The main oxides formed on combustion of Li, Na, and K in excess of air respectively are


A) LiO2,Na2O2and K2O

B) Li2O2,Na2O2andKO2

C) Li2O,Na2O2 and KO2

D) Li2O ,Na2O and KO2

Answer:

Option C

Explanation:

2Li+12O2(g)Li2O

2Na+O2(g)Na2O2

K+O2(g)KO2