Question

Among statement (1) - (4), the correct ones are

(1) Decomposition of hydrogen peroxide gives dioxygen.

(2) Like hydrogen perioxide, compound, such as $KClO _{3}, Pb \left( NO _{3}\right)_{2}$ and $NaNO _{3}$ when heated liberate dioxygen.

(3) 2-Ethylanthraquinone is useful for the industrial preparation ofhydrogen peroxide.

(4) Hydrogen peroxide is used for the manufacture of sodium per borate

• A. (1) and (3) only
• B. (1), (2), (3) and (4)
• C. (1), (3) and (4) only
• D. (1), (2) and (3) only

Answer 1

Answer: (B)

All these statements are correct as on decomposition hydrogen peroxide and compounds, such as $KClO _{3}, Pb \left( NO _{3}\right)_{2}$ and $NaNO _{3}$ when heated liberate dioxygen

$2H_{2}O_{2}\overset{\Delta }{ \rightarrow }2H_{2}O+O_{2}$

$2KClO_{3}\overset{\Delta }{ \rightarrow }2KCl+3O_{2}$

$2NaNO_{3}\overset{\Delta }{ \rightarrow }2NaNO_{2}+O_{2}$

Both 3 and 4 statements are correct as 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide and hydrogen peroxide is used for the manufacture of sodium per borate.