MCQ
Which of the following has highest chlorine content ?
- ✓Pyrene
- B$DDT$
- CChloral
- DGammaxene
$DDT$ (Dichloro diphenyl trichloroethane) (figure)
$\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,O\,} \\
{\,\,\,\,\,\,||} \\
{CC{l_3} - C - H}
\end{array}}\limits_{Chloral} $ $\mathop {{C_6}{H_6}C{l_6}}\limits_{Gam\max ene} $
Maximum chlorine content is present in pyrene.
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(Molar mass $= 98\,g\,mol^{-1}$ ) by mass will be

(image) $\xrightarrow{{B{r_3} + C{H_3} - COOH}}A\xrightarrow{{Alc.KOH}}B$ (Product with six membered ring) $\xrightarrow[{(2)\,{H_2}O}]{{(1)\,C{H_3} - MgBr}}C\xrightarrow{{{H^ \oplus } + \Delta }}D\xrightarrow{{HBr(1\,mole)}}E$
Reason : $NF_3$ ionizes to give $F^-$ ions in aqueous solution.