MCQ
Full name of $ DDT$ is
- ✓$1, \,1,\,1-$ trichloro $-\,2,\, 2\,-$ bis($p-$ chlorophenyl) ethane
- B$1,\, 1\,-$ dichloro $-\, 2,\, 2\,-$ diphenyl trimethylethane
- C$1, \,1\, -$ dichloro $-\,2, \,2\,-$ diphenyl trichloroethane
- DNone of these

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Reason : Alcohols leading to conjugated alkenes are dehydrated to a greater extent
$\frac{1}{2}{P_4}(s) + 3C{l_2}(g) \to 2PC{l_3}(l)\,;$ $\Delta H=-635 \,kJ$
$PC{l_3}(l) + C{l_2}(g) \to PC{l_5}(s)\,;$ $\Delta H=-137\, kJ$
The value of heat of formation of $PCl_5$ is ......$kJ\,mol^{-1}$
$2N_2O_5 \rightarrow 4NO_2 + O_2$ can be written in three ways.
$\frac{-d[N_2O_5 ]}{dt} = k[N_2O_5]$
$\frac{d[NO_2 ]}{dt} = k'[N_2O_5]\,;$ $\frac{d[O_2 ]}{dt} = k"[N_2O_5]$
The relationship between $k$ and $k'$ and betweenk and $k''$ are
$'X'$ and $'Y'$ are