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JEE Main 20188 April

Exam: JEE Main
Year: 2018
Date: 8 April
Subject: Chemistry
Chapter: p Block Elements (Group 15, 16, 17 & 18)

JEE Main 2018 · 8 April · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

The compound that does not produce nitrogen gas by thermal...

The compound that does not produce nitrogen gas by thermal decomposition is:

Options

A{ $\left(N{H}_{4}\right)}_{2}S{O}_{4}$
BBa{ $\left({N}_{3}\right)}_{2}$
C ${\left(N{H}_{4}\right)}_{2}C{r}_{2}{O}_{7}$
D $N{H}_{4}N{O}_{2}$

Correct answer

A. { $\left(N{H}_{4}\right)}_{2}S{O}_{4}$

Step-by-step solution

(i)

{\left(N{H}_{4}\right)}_{2}C{r}_{2}{O}_{7}\overset{\Delta}{\to}C{r}_{2}{O}_{3} + {N}_{2} + 4{H}_{2}O

(ii)

N{H}_{4}N{O}_{2}\overset{\Delta}{\to}{N}_{2} + 2{H}_{2}O

(iii)

{\left(N{H}_{4}\right)}_{2}S{O}_{4}\overset{\Delta}{\to}2N{H}_{3} + {H}_{2}S{O}_{4}

(iv)

Ba{\left({N}_{3}\right)}_{2}\overset{\Delta}{\to}Ba + 3{N}_{2}

In reaction (iii)

N{H}_{3}

is evolved whereas in reaction 1, 2 and 4

{N}_{2}

is evolved.

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