Question

$NH_{4}NO_{3} \xrightarrow{\Delta}A+H_{2}O$,
$NH_{3}+O_{2} \xrightarrow{{\text{Catalyst}} }B+H_{2}O$,
$Pb(NO_{3})_{2} \xrightarrow{\Delta} C+PbO+O_{2}$
Among $A$, $B$, and $C$ paramagnetic substance(s) is/are

• A. $B$ and $C$
• B. Only $B$
• C. $A$ and $C$
• D. Only $A$

Answer 1

Answer: (A)

$NH_{4}NO_{3} \to 2H_{2}O+N_{2}O (A)$
$4NH_{3}+5O_{2} \to 6H_{2}O+4NO(B)$
$2Pb(NO_{3})_{2} \xrightarrow{\Delta} 2PbO+O_{2}+4NO_{2}(C)$
Both nitric oxide $(NO)$ and nitrogen dioxide $(NO_{2})$ are paramagnetic in nature due to the presence of odd number of electron(s) in outer shell