pBlock ElementsII - Result 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. | $PbO _2+H _2 SO _4 \xrightarrow{?} PbSO _4+O _2+$ | 1. $NO$ |
| Q. | $Na _2 S _2 O _3+H _2 O \stackrel{?}{\longrightarrow} NaHSO _4+$ | 2. $\quad I _2$ |
| R. | $N _2 H _4 \stackrel{?}{\longrightarrow} N _2+$ other product | 3. Warm |
| S. | $XeF _2 \stackrel{?}{\longrightarrow} Xe+$ other product | 4. $\quad Cl _2$ |
Codes
$\begin{array}{llll}P & Q & R & S\end{array}$ P Q $\quad R \quad S$
(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) $2 PbO _2+2 H _2 SO _4 \xrightarrow{\text { Warm (3) }} 2 PbSO _4+O _2+2 H _2 O$
(Q) $Na _2 S _2 O _3+H _2 O \xrightarrow{Cl _2(4)} NaHSO _4+HCl$
(R) $N _2 H _4 \xrightarrow{I _2(2)} N _2+Hl$
(S) $XeF _2 \xrightarrow{NO(1)} Xe+NOF$
Thus, $P-(3), Q-(4)$, $R-(2)$, $S-(1)$
