Question

Select the correct choice for alkali metal oxides.

• A. Metal oxides react with water forming only metal hydroxides.
• B. Metal peroxides react with hot water forming metal hydroxides and oxygen gas.
• C. Metal superoxides react with water forming metal hydroxides, hydrogen peroxide and $O_2$ gas.
• D. All of these

Answer 1

The correct option is D All of these

(A) Metal oxides react with water forming only metal hydroxides.

$M_{2}O+H_{2}O\to 2MOH$

(B) Metal peroxides react with hot water forming metal hydroxides and oxygen gas.

$M_2{O}_2+H_{2}O\to 2MOH+1/2O_2$

(C) Metal superoxides react with water forming metal hydroxides, hydrogen peroxide and O2 gas.

$2M{O}_2+2H_{2}O\to 2MOH+H_2{O}_2+O_2$

Option D is correct.