MCQ
Which element from $V$ group, gives most basic compound with hydrogen
- ✓Nitrogen
- BBismuth
- CArsenic
- DPhosphorus
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(Given : $\Delta_{\mathrm{r}} \mathrm{H}_{298 \mathrm{~K}}^{\circ}=-54.07 \mathrm{~kJ} \mathrm{~mol}^{-1}, \Delta_{\mathrm{I}} \mathrm{S}_{298 \mathrm{~K}}^{\circ}=10 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ and $\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1} ; 2.303 \times 8.314 \times 298=5705$ )
| List-$I$ Species | List-$II$ Electronic distribution |
| $(A)$ $\mathrm{Cr}^{+2}$ | $(I)$ $3 \mathrm{~d}^8$ |
| $(B)$ $\mathrm{Mn}^{+}$ | $(II)$ $3 \mathrm{~d}^3 4 \mathrm{~s}^1$ |
| $(C)$ $\mathrm{Ni}^{+2}$ | $(III)$ $3\mathrm{~d}^4$ |
| $(D)$ $\mathrm{V}^{+}$ | $(IV)$ $3 \mathrm{~d}^5 4 \mathrm{~s}^1$ |
Choose the correct answer from the options given below:
$H{_2(g)} + 2ICl_{(g)} \to 2HCl_{(g)} + I_{2(g)}$
This reaction is of first order with respect to $H_{2(g)}$ and $ICl_{(g)}$ , following mechanisms were proposed
Mechanism $A$ :
$H{_2(g)} + 2ICl_{(g)} \to 2HCl_{(g)} + I_{2(g)}$
Mechanism $B$ :
$H_{2(g)} + ICl_{(g)} \to HCl_{(g)} + HI_{(g)}$ ; Slow
$HI_{(g)} + ICl_{(g)} \to HCl_{(g)} + I_{2(g)}$ ; Fast
Which of the above mechanism $(s)$ can be consistent with the given information about the reaction