The compound(s) which generate(s) N 2 gas upon thermal decomposition below 300 o C is (are)

The compound(s) which generate(s)

N_{2}

gas upon thermal decomposition below

300^{o} C

is (are)

$N H_{4} N O_{3}$
${(N H_{4})}_{2}_{} C r_{2} O_{7}$
$B a {(N_{3})}_{2}$
$M g_{3} N_{2}$

Solution

(A)

(B)

{(N H_{4})}_{2} C r_{2} O_{7} \overset{∆}{\to} N_{2} + C r_{2} O_{3} + 4 H_{2} O

(C)

B a {(N_{3})}_{2} \overset{∆}{\to} B a + 3 N_{2}

(D)

M g_{3} N_{2}

(It does not decompose into N₂) :

Asked in: JEE Advanced 2018 (Paper 1)

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