Tardigrade
Question
Chemistry
Among statement (1) - (4), the correct ones are (.1.) Decomposition of hydrogen peroxide gives dioxygen. (.2.) Like hydrogen perioxide, compound, such as KClO3,Pb(.NO3(.)2 and NaNO3 when heated liberate dioxygen. (.3.) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide. (.4.) Hydrogen peroxide is used for the manufacture of sodium per borate.

Q. Among statement (1) - (4), the correct ones are
$\left(\right.1\left.\right)$ Decomposition of hydrogen peroxide gives dioxygen.
$\left(\right.2\left.\right)$ Like hydrogen perioxide, compound, such as $KClO_{3},Pb\left(\right.NO_{3}\left(\left.\right)_{2}$ and $NaNO_{3}$ when heated liberate dioxygen.
$\left(\right.3\left.\right)$ 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.
$\left(\right.4\left.\right)$ Hydrogen peroxide is used for the manufacture of sodium per borate.

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(1) and (3) only

(1), (2), (3) and (4)

(1), (3) and (4) only

(1), (2) and (3) only

Solution:

All these statements are correct as on decomposition hydrogen peroxide and compounds, such as $KClO_{3},Pb\left(\right.NO_{3}\left(\left.\right)_{2}$ 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.

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