Question

Which of the following statements are correct?
(a) Decomposition of hydrogen peroxide gives dioxygen
(b) Like hydrogen peroxide, compounds such as $KCl{O}_3$, $Pb{\left(N{O}_3\right)}_2$ and $NaN{O}_3$ when heated, liberate dioxygen.
(c) 2- Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.
(d) Hydrogen peroxide is used for the manufacture of sodium perborate.

• A. (a), (c) and (d) only
• B. (a), (b) ,(c) and (d)
• C. (a), (b) and (c) only
• D. (a) and (c) only

Answer 1

The correct option is B (a), (b) ,(c) and (d)

$H_2{O}_2$ decomposes slowly and liberates dioxygen on exposure to light.
$2H_2{O}_2\left(l\right)\to 2H_{2}O\left(l\right)+O_2\left(g\right)$
Decomposition of $KCl{O}_3$, $Pb{\left(N{O}_3\right)}_2$ and $NaN{O}_3$ when heated, liberate dioxygen.
$KCl{O}_3\to KCl+O_2$
$Pb{\left(N{O}_3\right)}_2\to PbO+N{O}_2+O_2$
$NaN{O}_3\to NaN{O}_2+O_2$
The industrial preparation of hydrogen peroxide is by auto oxidation of 2-ethylanthraquinone.
Hydrogen peroxide is used for the manufacture of sodium perborate.

Hence, (b) is the correct option.