MCQ
Which carbocation is least likely to form as intermediate ?
- A${({C_6}{H_5})_5}\mathop C\limits^ + $
- B

- ✓

- D$C{H_2} = \mathop C\limits^ + H$



As at bridgehead position not possible to be planar.
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$H_2O(l) \rightarrow H^+(aq) + OH^-(aq)\,;\,\,\Delta H = 57.32\,kJ$
$H_2(g)+ \frac{1}{2} O_2(g) \rightarrow H_2O(l)\,;\,\, \Delta H=-286.20\,kJ$
The value of enthalpy of formation of $OH^-$ ion at $25\,^oC$ is : .............. $\mathrm{kJ}$
$CH_4(g) + 2O_2(g) \rightleftharpoons CO_2(g) + 2H_2O(l) \,\,\,\Delta H_r =\, -170.8\, kJ\, mol^{-1}$
Which of the following statements is not true
