Question

Assertion : Pure $N_2$ is formed from $Ba(N_3)_2$.
Reason : Thermal decomposition of $NaN_3$ is used to inflate the air bags used for safety devices in some cars.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

Correct explanation: $B a\left(N_{3}\right)_{2}$ upon thermal decomposition gives pure $N_{2}$.
$B a\left(N_{3}\right)_{2} \xrightarrow{\text { heat }} B a+3 N_{2}$