MCQ
Benzene is obtained by
- ASubstitution of three acetylene molecules
- BAddition of three ${C_2}{H_2}$ molecules
- ✓Polymerisation of three ${C_2}{H_2}$ molecules
- DCondensation of three ${C_2}{H_2}$ molecules
$3CH \equiv CH\mathop {\xrightarrow{{{\text{heat}}}}}\limits_{Cu,\,{{500}\,^o}C} $
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($A$) can also be prepared by reaction of $\mathrm{P}_4$ and $\mathrm{HNO}_3$
($B$) is diamagnetic
($C$) contains one $\mathrm{N}-\mathrm{N}$ bond
($D$) reacts with $\mathrm{Na}$ metal producing a brown gas