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CHXII13:AMINES

324089 Consider the following basicity order of amines
I. supporting img
II.
III.

1 I, II and III

2 I and II

3 II and III

4 I and III

Explanation:

(I). In second structure, lone pair of nitrogen is involved in resonance. So, less basic than first compound
(II). ${sp}^{3}$ hybridised compounds are more basic than ${sp}^{2}$ hybridised compound
(III) $> C = O$ group is -I.E. and -M.E group. More number of -I.E. group, less is basic in nature.

CHXII13:AMINES

324090 How many of the following amines are stronger bases than ammonia?
supporting img

1 1

2 2

3 3

4 4

Explanation:

Aliphatic amines are stronger bases than ammonia due to +I effect of alkyl groups.
$∴$ Compounds II, IV, V and VI are stronger bases than ammonia.

CHXII13:AMINES

324091 In aqueous solution the weakest base is

1

{CH}_{3} {NH}_{2}

2

{({CH}_{3})}_{2} NH

3

C_{2} H_{5} {NH}_{2}

4

C_{6} H_{5} {NHCH}_{3}

CHXII13:AMINES

324092 The correct order of decreasing basic character is
$\underset{I}{C_{6} H_{5} N H_{2}}$
$\underset{I I}{C_{6} H_{5} C H_{2} N H_{2}}$
$\underset{I I I}{{(C_{6} H_{5})}_{2} N H}$
$\underset{I V}{C_{6} H_{11} N H_{2}}$

1 II

>

I

>

III

>

IV

2 IV

>

II

>

I

>

III

3 IV

>

III

>

II

>

I

4 IV

>

II

>

III

>

I

CHXII13:AMINES

324089 Consider the following basicity order of amines
I. supporting img
II.
III.

1 I, II and III

2 I and II

3 II and III

4 I and III

Explanation:

(I). In second structure, lone pair of nitrogen is involved in resonance. So, less basic than first compound
(II). ${sp}^{3}$ hybridised compounds are more basic than ${sp}^{2}$ hybridised compound
(III) $> C = O$ group is -I.E. and -M.E group. More number of -I.E. group, less is basic in nature.

CHXII13:AMINES

324090 How many of the following amines are stronger bases than ammonia?
supporting img

1 1

2 2

3 3

4 4

Explanation:

Aliphatic amines are stronger bases than ammonia due to +I effect of alkyl groups.
$∴$ Compounds II, IV, V and VI are stronger bases than ammonia.

CHXII13:AMINES

324091 In aqueous solution the weakest base is

1

{CH}_{3} {NH}_{2}

2

{({CH}_{3})}_{2} NH

3

C_{2} H_{5} {NH}_{2}

4

C_{6} H_{5} {NHCH}_{3}

CHXII13:AMINES

324092 The correct order of decreasing basic character is
$\underset{I}{C_{6} H_{5} N H_{2}}$
$\underset{I I}{C_{6} H_{5} C H_{2} N H_{2}}$
$\underset{I I I}{{(C_{6} H_{5})}_{2} N H}$
$\underset{I V}{C_{6} H_{11} N H_{2}}$

1 II

>

I

>

III

>

IV

2 IV

>

II

>

I

>

III

3 IV

>

III

>

II

>

I

4 IV

>

II

>

III

>

I

CHXII13:AMINES

324089 Consider the following basicity order of amines
I. supporting img
II.
III.

1 I, II and III

2 I and II

3 II and III

4 I and III

Explanation:

(I). In second structure, lone pair of nitrogen is involved in resonance. So, less basic than first compound
(II). ${sp}^{3}$ hybridised compounds are more basic than ${sp}^{2}$ hybridised compound
(III) $> C = O$ group is -I.E. and -M.E group. More number of -I.E. group, less is basic in nature.

CHXII13:AMINES

324090 How many of the following amines are stronger bases than ammonia?
supporting img

1 1

2 2

3 3

4 4

Explanation:

Aliphatic amines are stronger bases than ammonia due to +I effect of alkyl groups.
$∴$ Compounds II, IV, V and VI are stronger bases than ammonia.

CHXII13:AMINES

324091 In aqueous solution the weakest base is

1

{CH}_{3} {NH}_{2}

2

{({CH}_{3})}_{2} NH

3

C_{2} H_{5} {NH}_{2}

4

C_{6} H_{5} {NHCH}_{3}

CHXII13:AMINES

324092 The correct order of decreasing basic character is
$\underset{I}{C_{6} H_{5} N H_{2}}$
$\underset{I I}{C_{6} H_{5} C H_{2} N H_{2}}$
$\underset{I I I}{{(C_{6} H_{5})}_{2} N H}$
$\underset{I V}{C_{6} H_{11} N H_{2}}$

1 II

>

I

>

III

>

IV

2 IV

>

II

>

I

>

III

3 IV

>

III

>

II

>

I

4 IV

>

II

>

III

>

I

CHXII13:AMINES

324089 Consider the following basicity order of amines
I. supporting img
II.
III.

1 I, II and III

2 I and II

3 II and III

4 I and III

Explanation:

(I). In second structure, lone pair of nitrogen is involved in resonance. So, less basic than first compound
(II). ${sp}^{3}$ hybridised compounds are more basic than ${sp}^{2}$ hybridised compound
(III) $> C = O$ group is -I.E. and -M.E group. More number of -I.E. group, less is basic in nature.

CHXII13:AMINES

324090 How many of the following amines are stronger bases than ammonia?
supporting img

1 1

2 2

3 3

4 4

Explanation:

Aliphatic amines are stronger bases than ammonia due to +I effect of alkyl groups.
$∴$ Compounds II, IV, V and VI are stronger bases than ammonia.

CHXII13:AMINES

324091 In aqueous solution the weakest base is

1

{CH}_{3} {NH}_{2}

2

{({CH}_{3})}_{2} NH

3

C_{2} H_{5} {NH}_{2}

4

C_{6} H_{5} {NHCH}_{3}

CHXII13:AMINES

324092 The correct order of decreasing basic character is
$\underset{I}{C_{6} H_{5} N H_{2}}$
$\underset{I I}{C_{6} H_{5} C H_{2} N H_{2}}$
$\underset{I I I}{{(C_{6} H_{5})}_{2} N H}$
$\underset{I V}{C_{6} H_{11} N H_{2}}$

1 II

>

I

>

III

>

IV

2 IV

>

II

>

I

>

III

3 IV

>

III

>

II

>

I

4 IV

>

II

>

III

>

I