Among statements (a) - (d), the correct ones are: (a) Decomposition of hydrogen peroxide gives di-oxygen. (b) Like hydrogen peroxide, compounds, such as KCl O _ 3 , Pb(N O _ 3 ) and NaNO _ 3 When heated liberate

Correct answer: A. (a), (b), (c) and (d) (a) H _ 2 O _ 2 → 2 H _ 2 O + O _ 2 (b) KClO _ 3 Δ → KCl + (3)/(2) O _ 2 Pb ( NO _ 3 ) _ 2 Δ → PbO + 2 NO _ 2 + (1)/(2) O _ 2 NaNO _ 3 Δ → NaNO _ 2 + (1)/(2) O _ 2 (c)2 - ethylanthraquinol O _ 2 → 2 - ethylanthraquinone + H _ 2 O _ 2 (d)2 H _ 3 BO _ 3 + 2NaOH + 2 H _ 2 O _ 2 → [ Na _ 2 [ B _ 2 ( O _ 2 ) ( OH ) _ 4 ] + 4 H _ 2 O ] All statements are correct

JEE Main 20207 JanuaryEvening Shift

Exam: JEE Main
Year: 2020
Date: 7 January
Shift: Evening Shift
Subject: Chemistry
Chapter: Hydrogen

JEE Main 2020 · 7 January · Evening Shift · Chemistry · Hydrogen

Among statements (a) - (d), the correct ones are: (a) Decomposition...

Among statements

\left(a\right) -

\left(d\right),

the

correct ones are:
\left(a\right) Decomposition of hydrogen peroxide gives di-oxygen.
\left(b\right) Like hydrogen peroxide, compounds, such as

KCl{O}_{3}, Pb\left(N{O}_{3}\right)

and {NaNO}_{3} When heated liberate di-oxygen.
\left(c\right) 2

-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.<br />

\left(d\right) Hydrogen peroxide is used for the manufacture of sodium perborate.

Options

A $\left(a\right), \left(b\right), \left(c\right)$ and \left(d\right)
B $\left(a\right),$ \left(b\right), $and \left(c\right)$ only
C $\left(a\right),$ \left(c\right), $and \left(d\right)$ only
D $\left(a\right)$ and $\left(c\right)$ only

Correct answer

A. $\left(a\right), \left(b\right), \left(c\right)$ and \left(d\right)

Step-by-step solution

\text{(a)}{\text{H}}_{2} {\text{O}}_{2} \to 2{\text{H}}_{2} \text{O} + {\text{O}}_{2}

{\text{(b) KClO}}_{3}\overset{\Delta}{\to}\text{KCl} + \dfrac{3}{2}{\text{O}}_{2}

\text{Pb}{\left({\text{NO}}_{3}\right)}_{2}\overset{\Delta}{\to}\text{PbO} + 2{\text{NO}}_{2} + \dfrac{1}{2}{\text{O}}_{2}

{\text{NaNO}}_{3}\overset{\Delta}{\to}{\text{NaNO}}_{2} + \dfrac{1}{2}{\text{O}}_{2}

\text{(c)}2 - \text{ethylanthraquinol}\overset{{O}_{2}}{\to}\text{2} - \text{ethylanthraquinone} + {\text{H}}_{2}{\text{O}}_{2}

\text{(d)}2{\text{H}}_{3}{\text{BO}}_{3} + 2\text{NaOH} + 2{\text{H}}_{2}{\text{O}}_{2} \to [ {\text{Na}}_{2}\left[{\text{B}}_{2}\left({\text{O}}_{2}\right){( \text{OH} )}_{4}\right] + 4{\text{H}}_{2}\text{O} ]

All statements are correct

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