MCQ
$IUPAC$ name of


- A$2,6,6-$ Trimethylbicyclo$[1.1.3]$hept $-2 -$ ene
- B$2,2,6-$ Trimethylbicyclo$[3.1.1]$hept $-5 -$ ene
- ✓$2,6,6-$ Trimethylbicyclo$[3.1.1]$hept $-2 -$ ene
- D$2,7,7-$ Trimethylbicyclo$[3.1.1]$hept $-2 -$ ene


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| Rate constant | Activation energy | |
| Step $1$ | $k_1$ | $E_{a_1} = 180\,kJ /mol$ |
| Step $2$ | $k_2$ | $E_{a_2} = 80\,kJ /mol$ |
| Step $3$ | $k_3$ | $E_{a_3} = 50\,kJ /mol$ |
overall rate constant, $k = {\left( {\frac{{{k_1}{k_2}}}{{{k_3}}}} \right)^{2/3}}$ overall activation energy of the reaction will be ........ $kJ\,mol$

$\xrightarrow{{SOC{l_2}}}B\xrightarrow{{N{H_3}}}C\xrightarrow[{B{r_2}}]{{NaOH}}D$