Amines Test

Result

Amines Test - 62

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Weekly Quiz Competition

Question 1
1 / -0

The correct order of decreasing basicity of the given compounds is :

A
I $$>$$ II $$>$$ III $$>$$ IV

B
II $$>$$ I $$>$$ IV $$>$$ III

C
III $$>$$ IV $$>$$ II $$>$$ I

D
II $$>$$ I $$>$$ III $$>$$ IV

Solution
Question 2
1 / -0

Which is the weakest base among the followings?

A

B

C

D

Solution

Lewis base = The entity that has the tendency to donate electrons,
Here in $$4th$$ compound, lone pairs of $$N$$ is not going in resonance but two $$Methyl(-CH_3)$$ group are sterically hindered it to donate electrons, that's why it is weakest base.
Question 3
1 / -0

The solubility of diethyl ether in water is comparable with that of:

A
ethanamine

B
chlorobutane

C
1-butanol

D
ethanol

Solution

Diethyl ether is a common polar aprotic solvent. It has limited solubility in water and dissolves in water. In di-ethyl ether, the flexible chain of atoms sweeps out a volume that prevents hydrogen bonding between the ether oxygen atom and hydrogen atoms of water. But ethanamine soluble in water and form intermolecular $$H-$$ bonds with water.
Question 4
1 / -0

Compare the basic strength of compounds given:

A
$$(i) > (ii) > (iii)$$

B
$$(ii) > (i) > (iii)$$

C
$$(ii) > (iii) > (i)$$

D
$$(iii) > (ii) > (i)$$

Solution
Question 5
1 / -0

Which of the following compound is the most basic?

A

B

C

D
Question 6
1 / -0

Which of the following aryl amine undergoes diazotization most readily?

A

B

C

D

Solution

Diazotization reaction is an electrophilic
substitution reaction.
so, the benzene ring attached with more
The mesomeric effect group(+M) will readily
undergo a diazotization reaction.
so option $$c$$ is correct.
Question 7
1 / -0

The correct order of basicites of the following compounds is:-

A
$$II > I > III > IV$$

B
$$I > III > II > IV$$

C
$$III > I > II > IV$$

D
$$I > II > III > IV$$
Question 8
1 / -0

$$CH_3NH_2 \quad \underrightarrow{{(CH_3COOCH_3)}, { \Delta}} \quad X$$

A
X is more basic than $$CH_3NH_2$$

B
X is less basic than $$CH_3NH_2$$

C
X is a tertiary amine

D
None
Question 9
1 / -0

The correct decreasing order of $$p{ K }_{ b }$$:

A
$$I>II>III>IV$$

B
$$III>IV>II>I$$

C
$$II>III>IV>I$$

D
$$IV>II>I>III$$

Solution

We know that more is the $$pK_b$$ value ,less basic will be the given compound.

Since chlorine exerts $$-I$$ effect , hence it is least basic and has more $$pK_b$$ value.

Similarly , on basis on electronic effects, the answer is option D.
Question 10
1 / -0

Diazomethane was photolysed to generate singlet carbine which was treated with cis-2-butene. The main product(s) of the reaction is/are:

A
cis-1, 2-dimethylcyclopropane

B
trans-1, 2-dimethylcyclopropane

C
mixture of $$(A)$$ and $$(B)$$

D
Ethylcyclopropane

Solution

Solution:- (A) cis-$$1,2$$-dimethylcyclopropane
$$\underset{\text{Diazomethane}}{C{H}_{2}-\overset{+}{N}={N}^{-}} \xrightarrow[-N \equiv N]{h \nu} \underset{\text{Singlet carbene} \left( \text{Methylene} \right)}{:C{H}_{2}}$$
The addition of methylene would yield trans-$$1,2$$-dimethylcyclopropane from trans-$$2$$-butene and cis-$$1,2$$-dimethylcyclopropane from cis-$$2$$-butene.