CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Amines as Bases

Among methyla...

Question

Among methylamine and aniline, the number of $C$ atoms in compound with lower $p K_{b}$ is:

Open in App

Solution

Lower is the value of $p K_{b}$ , stronger is the base.
$p K_{b}$ of methylamine is less than that of aniline.
Thus methylamine is a stronger base than aniline.
This is because, in aniline, the lone pair on nitrogen is involved in resonance with aromatic nucleus. Hence, it is not available for donation.

Suggest Corrections

thumbs-up

0

Similar questions

{p K}_{b}

for aniline is more then of methylamine.

p K b

of aniline is more than that of methylamine. Reason: In aniline, the lone pair of electrons on the

N

atom is delocalized over the benzene ring. As a result, the electron density of nitrogen decreases. In contrast, in

{C H}_{3} {N H}_{2} (+ I)

{C H}_{3}

increases the electron density on the

N

atom. Therefore, aniline is a weaker base than methylamine and hence its

p K_{b}

value is higher than that of methylamine.

Q. Give reason:
The

p K_{b}

of aniline is greater than methylamine.

Q. Account for the following:
(i)

p K_{b}

of aniline is more than that of methylamine.
(ii) Ethylamine is soluble in water whereas aniline is not.
(iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.

p K_{b}

of aniline is more than that of methylamine.
If this is true enter 1, if false enter 0.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Chemical Properties

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Amines as Bases

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon