pBlock ElementsII 1 Question 66
61. The unbalanced chemical reactions given in Column I show missing reagent or condition (?) which are provided in Column II. Match Column I with Column II and select the correct answer using the codes given below the Columns.
(2013 Adv.)
| Column I | Column II | |
|---|---|---|
| P. | $\mathrm{PbO}{2}+\mathrm{H}{2} \mathrm{SO}{4} \xrightarrow{?} \mathrm{PbSO}{4}+\mathrm{O}_{2}+$ | 1. $\mathrm{NO}$ |
| Q. | $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}+\mathrm{H}{2} \mathrm{O} \stackrel{?}{\longrightarrow} \mathrm{NaHSO}_{4}+$ | 2. $\quad I_{2}$ |
| R. | $\mathrm{N}{2} \mathrm{H}{4} \stackrel{?}{\longrightarrow} \mathrm{N}_{2}+$ other product | 3. Warm |
| S. | $\mathrm{XeF}_{2} \stackrel{?}{\longrightarrow} \mathrm{Xe}+$ other product | 4. $\quad \mathrm{Cl}_{2}$ |
Codes
$\begin{array}{llll}\mathrm{P} & \mathrm{Q} & \mathrm{R} & \mathrm{S}\end{array}$ P Q $\quad \mathrm{R} \quad \mathrm{S}$
(a) $4 \quad 2 \quad 3 \quad 1$
(b) $\begin{array}{llll}3 & 2 & 1 & 4\end{array}$
(c) $1 \quad 4 \quad 2 \quad 3$
Fill in the Blanks
Show Answer
Solution:
- (P) $2 \mathrm{PbO}{2}+2 \mathrm{H}{2} \mathrm{SO}{4} \xrightarrow{\text { Warm (3) }} 2 \mathrm{PbSO}{4}+\mathrm{O}{2}+2 \mathrm{H}{2} \mathrm{O}$
(Q) $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}+\mathrm{H}{2} \mathrm{O} \xrightarrow{\mathrm{Cl}{2}(4)} \mathrm{NaHSO}{4}+\mathrm{HCl}$
(R) $\mathrm{N}{2} \mathrm{H}{4} \xrightarrow{\mathrm{I}{2}(2)} \mathrm{N}{2}+\mathrm{Hl}$
(S) $\mathrm{XeF}_{2} \xrightarrow{\mathrm{NO}(1)} \mathrm{Xe}+\mathrm{NOF}$
Thus, $\mathrm{P}-(3), \mathrm{Q}-(4)$, $\mathrm{R}-(2)$, $\mathrm{S}-(1)$
