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JEE Main levelOne or more correct optionsDifficulty 2 of 3nc028

Which statements are correct?

AIn water $(CH X_{3}) X_{3} N$ is a stronger base than $(CH X_{3}) X_{2} NH$ .
BIn the gas phase $(CH X_{3}) X_{3} N$ is a stronger base than $(CH X_{3}) X_{2} NH$ .
CIn water the order $(C X_{2} H X_{5}) X_{3} N > C X_{2} H X_{5} NH X_{2}$ holds.
DIn water $CH X_{3} NH X_{2}$ is a stronger base than $(CH X_{3}) X_{3} N$ .

Answer: B, C, D

In the gas phase the +I effect alone matters, so trimethylamine is the strongest. In water the order is

(CH X_{3}) X_{2} NH > CH X_{3} NH X_{2} > (CH X_{3}) X_{3} N > NH X_{3}

for methylamines and

(C X_{2} H X_{5}) X_{2} NH > (C X_{2} H X_{5}) X_{3} N > C X_{2} H X_{5} NH X_{2} > NH X_{3}

for ethylamines. Hence the first three are true and the last is false.

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