MCQ
Phosgene is the common name of
- ✓Carbonyl chloride
- BPhosphine
- CPhosphorus oxychloride
- DPhosphorus trichloride
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
($R $ = alkyl group; $en$ = ethylenediamine)

The time taken for $A$ to become $1 / 4^{\text {th }}$ of its inital concentration is twice the time taken to become $1 / 2$ of the same. Also, when the change of concentration of $B$ is plotted against time, the resulting graph gives a straight line with a negative slope and a positive intercept on the concentration axis. The overall order of the reaction is . . . . .