Organic Compounds Containing Nitrogen Test

Result

Organic Compounds Containing Nitrogen Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Methyl ethyl propylamine forms non-superimposable mirror images, but it does not show optical activity because

A
of rapid flipping

B
of absence of asymmetry

C
nitrogen has a lone pair of electrons

D
None of these

Solution

Methyl ethyl propylamine is a tertiary amine which is chiral but the enatiomers cannot be resolved due to rapid pyramidal inversion or flipping.
Hence, it always remains in the form of racemic mixture and is hence optically inactive.
Question 2
1 / -0

Which of the following is correct about amines?

A
Amines behave as Lewis acids.

B
Amines behave as Lewis bases.

C
CH₃CH₂CH₂NH₂ is solid in nature.

D
An aliphatic amine is a weaker base than ammonia.

Solution

An amine has an unshared pair of electrons on nitrogen atom, due to which it has nucleophilic centre. The group which has nucleophilic centre behaves as Lewis base, so amines behave as Lewis bases.
Question 3
1 / -0

Which of the following is not a characteristic of amines?

A
They smell like ammonia.

B
They are inflammable in air.

C
They show the property of hydrogen bonding.

D
They are basic in nature.

Solution

Amines are not inflammable in air.
Question 4
1 / -0

Which one of the following reagents will be useful for separating a mixture of nitrobenzene and aniline?

A
Aqueous NaHCO₃

B
H₂O

C
Aqueous HCl

D
Aqueous NaOH

Solution

The reagent selected should be such that only one of the components to be separated reacts with it.
Aniline + aq. HCl → Salt (which is water soluble)
Nitrobenzene + aq. HCI → No reaction
Therefore, aqueous HCI is used to separate aniline and nitrobenzene.