MCQ
Which of the following odd $e^-$ species is planar ?
- ✓$CH_3^+$
- B$\dot C lO_3$
- C$\dot C F_3$
- DNone of these
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The $\%$ yield for reaction $I$ is $60 \%$ and that of reaction II is $50 \%$. The overall yield of the complete reaction is $..........\%$ [nearest integer]
(Given $R=2.0 \mathrm{cal} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ )
[Atomic mass : $\mathrm{H}: 1.0, \mathrm{C}: 12.0, \mathrm{O}: 16.0]$
| Process | $\Delta H / kJ\,mol ^{-1}$ | $\Delta S / J K^{-1}$ |
| $A$ | $-25$ | $-80$ |
| $B$ | $-22$ | $40$ |
| $C$ | $25$ | $-50$ |
| $D$ | $22$ | $20$ |
The number of non-spontaneous process from the following is $.....$