Amines Test

Result

Amines Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Strength of acid increases with the attachment of group showing $$-I$$ effect and decrease with the attachment of group showing $$+I$$ effect. Which of the following is the correct sequence of basic strength in an aqueous solution?

A
$$CH_{3}NH_{2}<\left(CH_{3}\right)_{2}NH<\left(CH_{3}\right)_{3}N$$

B
$$\left( { CH }_{ 3 } \right) _{ 2 }NH<{ CH }_{ 3 }{ NH }_{ 2 }<\left( CH_{ 3 } \right) _{ 3 }N$$

C
$$(CH_{3})_{3}N<\ (CH_{3})_{2}NH<\ CH_{3}NH_{2}$$

D
$$(CH_{3})_{3}N<\ CH_{3}NH_{2}<\ (CH_{3})_{2}NH$$

Solution
Question 2
1 / -0

Among the labelled nitrogen atoms, which one is least basic?

A
a

B
b

C
c

D
d
Question 3
1 / -0

The increasing order of diazotization of the above compounds is:

A
$$(D) < (C) < (B) < (A)$$

B
$$(A) < (D) < (B) < (C)$$

C
$$(A) < (B) < (D) < (C)$$

D
$$(C) < (D) < (B) < (A)$$

Solution
Question 4
1 / -0

The correct order of basic strength of the following amines is:

A
$$(C_{2}H_{5})_{2}NH>C_{2}H_{5}NH_{2}>NH_{3}>C_{6}H_{5}NH_{2}$$

B
$$C_{2}H_{5}NH_{2}>(C_{2}H_{5})NH>NH_{3}>C_{6}H_{5}NH_{2}$$

C
$$(C_{2}H_{5})_{2}NH>NH_{3}>C_{2}H_{5}NH_{2}>C_{6}H_{5}NH_{2}$$

D
$$(C_{2}H_{5})_{2}NH>C_{6}H_{5}NH_{2}>C_{2}H_{5}NH_{2}>NH_{3}$$
Question 5
1 / -0

Among the following which is the strongest base:

A

B

C

D
Question 6
1 / -0

In compound (X), the correct order of basic strength nitrogen atoms is:

A
$$a>c>d$$

B
$$a>b>c$$

C
$$c>b>a$$

D
$$b>c>a$$
Question 7
1 / -0

Which nitrogen is most basic?

A
$$1$$

B
$$2$$

C
$$3$$

D
$$All\ are\ equally\ basic$$
Question 8
1 / -0

The increasing basicity under of the following compounds is :

$$(A)$$ $$CH_3CH_2NH_2$$

$$(B)$$ $$CH_3CH_2\overset{\,\,\,\,\,\,\,\,\,\,\,CH_2CH_3} {\overset{|\,\,\,\,\,}{NH}}$$

$$(C)$$ $$H_3C-\overset {\,\,\,\,\,\,CH_3}{\overset{|}{N}}-CH_3$$

$$(D)$$ $$ Ph-\overset {\,\,\,\,\,\,CH_3}{\overset{|}{N}}-H$$

A
$$D < C < A < B$$

B
$$A < B < D < C$$

C
$$A < B < C < D$$

D
$$D < C < B < A$$

Solution

$$(C_2H_5)_2NH > C_2H_5{NH}_2 > (CH_3)_3-N > Ph-\overset{\overset {\displaystyle \,\,\,\,\,\,\,\, {CH}_3}{|}}{N}-H$$

-I effect of phenyl decreases basicity. Rest all alkyl group show +I effect and their basicity order is as mentioned above. Hence option A is correct
Question 9
1 / -0

The correct increasing order of basic strength of the labelled N:

A
I < II < III< IV

B
II < I < III < IV

C
I < III< IV < II

D
I < II< IV< III
Question 10
1 / -0

In the following compound, the favourable site/s for protonation is/are:

A
(b), (c) and (d)

B
(a)

C
(a) and (e)

D
(a) and (d)

Solution

Localised lone pair $$e^-$$ are favourable sites for protonation. So, the answer would be b, c and d since lone pair are localised in this case.