Question

Among statements (a)-(d), the correct ones are:
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), (b), and (c) only
B. (a) and (c) only
C. (a), (b), (c) and (d)
D. (a), (c) and (d) only

Answer 1

Hint: Hydrogen Peroxide is also called oxygenated water. Hydrogen Peroxide $\left( {{{{H}}_{{2}}}{{{O}}_{{2}}}} \right)$ is diamagnetic and more highly associated via hydrogen bonding than oxygen. Oxidation and reduction by $\left( {{{{H}}_{{2}}}{{{O}}_{{2}}}} \right)$ in acidic medium is generally slow while it is rapid in alkaline solution.

Complete step by step answer:
In statement (a) ${{{H}}_{{2}}}{{{O}}_{{2}}}$ on heating decomposes rapidly.
It was assuming that heating of $\left( {{{{H}}_{{2}}}{{{O}}_{{2}}}} \right)$ is done in water or simply a dilute solution of ${{{H}}_{{2}}}{{{O}}_{{2}}}$ is used.
\[{{{H}}_{{2}}}{{{O}}_{{2}}}{{ + 2}}{{{H}}_{{2}}}{{O + }}{{{O}}_{{2}}}{{;\Delta H = - 196kJ}}\]
It is an example of auto oxidation and auto reduction.
In statement (b) ,
Potassium chlorate, when heated in the presence of manganese dioxide catalyst, decomposes to form potassium chloride and oxygen gas.
\[{{2KCl}}{{{O}}_{{{3(s)}}}}\xrightarrow[{{{Mn}}{{{O}}_{{2}}}}]{{{\Delta }}}\,{{2KC}}{{{l}}_{{{(s)}}}}{{ + 3}}{{{O}}_{{{2(g)}}}}\]
 ${{Pb(N}}{{{O}}_{{3}}}{{{)}}_{{2}}}$ , lead nitrate on strong heating decompose to form lead monoxide, nitrogen dioxide and oxygen gas.
${{2Pb(N}}{{{O}}_{{3}}}{{{)}}_{{2}}}\xrightarrow{{{\Delta }}}{{ 2Pb}}{{{O}}_{{{(s)}}}}{{ + }}{{{O}}_{{2}}}{{ + 4N}}{{{O}}_{{2}}}$
Thermal decomposition of ${{NaN}}{{{O}}_{{3}}}$ gives sodium nitrate and oxygen.
Reaction occurs at 380-500 $^{{o}}{{C}}$.
\[{{2NaN}}{{{O}}_{{3}}} \to {{2NaN}}{{{O}}_{{2}}}{{ + }}{{{O}}_{{2}}}\]
In statement (c),
2-Ethylanthraquinone instead of 2-Ethylanthraquinone should be there, as, 2-Ethylanthraquinone is formed from the auto oxidation of, 2-Ethylanthraquinone along with ${{{H}}_{{2}}}{{{O}}_{{2}}}$
In statement (d),
sodium perborate used as bleaching agents in liquid and solid detergents.
It is formed when sodium metaborate is mixed with sodium hydroxide and hydrogen peroxide.

So as all the statements are correct then the option (C), is correct.

Additional Information:
-Hydrogen Peroxide in its pure form, is pale blue in colour and colourless in solution
-Hydrogen Peroxide is used on the skin to prevent infections of cuts and burns.
-It is also used in mouth rinse to help control bad breath and even gingivitis.

Note:
Hydrogen Peroxide acts as an oxidizing as well as reducing agent in both acidic and alkaline mediums. It decomposes slowly on exposure to light. Hydrogen Peroxide works by releasing oxygen causing foaming which helps to remove the dead skin when applied on the affected area. It can also act as a disinfectant.