How many molecules of methyl iodide are required to obtain tetramethyl ammonium iodide from dimethyl amine?

How many molecules of methyl iodide are required to obtain tetramethyl ammonium iodide from dimethyl amine?
  1. 1
  2. 3
  3. 2
  4. 4

Solution

$\mathrm{CH}_3-\mathrm{NH}-\mathrm{CH}_3 \stackrel{\mathrm{CH}_3-\mathrm{I}}{\longrightarrow}\left(\mathrm{CH}_3\right)_3 \mathrm{~N} \stackrel{\mathrm{CH}_3 \mathrm{I}}{\longrightarrow}\left(\mathrm{CH}_3\right)_4 \stackrel{+}{\mathrm{N}} \mathrm{I}^{-}$ tetra methyl ammonium iodide no of molecule of $\mathrm{CH}_3 \mathrm{I}=2$

Asked in: MHT CET 2021 (20 Sep Shift 1)

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