Amines Test

Result

Amines Test - 43

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Weekly Quiz Competition

Question 1
1 / -0

Which among the following is amphoteric ?

A
$$CH_3-NH_2$$

B
$$(CH_3)_2NH$$

C
$$(CH_3)_3N$$

D
$$CH_3CONH_2$$

Solution

here $$CH_3CONH_2 $$ is amphoteric
Question 2
1 / -0

Arrange following amines in the decreasing order of their basicity:

A
$$I>III>II$$

B
$$I>II>III$$

C
$$III>II>I$$

D
$$II>III>I$$

Solution

I>III>II this is correct because of ii option in amine is under resonanc eso this is less basicity
Question 3
1 / -0

Which of the following is insoluble in dil. HCI ?

A
Aniline

B
Triphenylamine

C
Ethylamine

D
Dimethylamine

Solution

Triphenylamine is insoluble in Dil HCl
Question 4
1 / -0

Which of the following has the highest $$pK_b$$ value ?

A

B

C

D

Solution

chloroform added and long carbon chain amine is contain ahighest pKb value
Question 5
1 / -0

Which of the following may be prepared by Gabriel phthalimide synthesis ?

A
Aliphatic amines

B
Aromatic amines

C
Aliphatic amides

D
Aromatic amides

Solution

Aliphatic amines are
prepared by Gabriel phthalimide synthesis
Question 6
1 / -0

Which of the following is insoluble in dil. HCI ?

A
Aniline

B
Triphenylamine

C
Ethylamine

D
Dimethylamine

Solution

Triphenylamine
Question 7
1 / -0

The strongest base among the following is:

A
$$C_6H_5NH_2$$

B
$$CH_3NH_2$$

C
$$(CH_3)_2NH$$

D
$$(CH_3)_3N$$

Solution

secondry amine is strongest base
C is correct
Question 8
1 / -0

$$CH_3CH_2NH_2$$ contains a basic $$NH_2$$ group, but $$CH_3CONH_2$$ does not because:

A
in $$CH_3CONH_2$$, the lone pair of electron on N-atom is delocalised due to resonance

B
$$CH_3CONH_2$$ is amphoteric in nature

C
in $$CH_3CH_2NH_2$$, the lone pair of electrons on N-atom is delocalised due to resonance

D
$$CH_3CONH_2$$ is an acidic derivative

Solution

in $$CH_3CONH_2$$, the lone pair of electron on N-atom is delocalised due to resonance
Question 9
1 / -0

Which one of the following on reduction with $${ LiAlH }_{ 4 }$$ yields a secondary amine?

A
Methyl cyanide

B
Nitroethane

C
Methyl isocyanide

D
Acetamide

Solution

On catalytic reduction or with lithium aluminium hydride (LiAlH4) or with nascent hydrogen, alkyl isocyanide yield 2∘ amine whereas cyanide gives 1∘ amine on reduction.
hence c is correct answer
Question 10
1 / -0

A solution of ethylamine:

A
turns blue litmus red

B
turns red litmus blue

C
does not affect the litmus

D
bleaches the litmus

Solution

ethylamine is a base so turns red litmus to blue