Amines Test

Result

Amines Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

The correct statement among the following is:

A
boiling point of amine is more than that of alcohol of nearly same molecular mass

B
the solubility of amines in water increases with increase in molecular mass

C
the order of boiling point of isomeric amines is primary > secondary > tertiary

D
none of these

Solution

1. Boiling point of amines have high boiling point due to presence of hydrogen bonding between amine molecules.

2. But the boiling point decreases with increase in alkyl groups attached to the N atom, because the number of H atoms present for hydrogen bonding decreases.
Question 2
1 / -0

Which compound is more basic ?

A

B

C

D
all of them are equally basic

Solution

Basically increases with increase in electron releasing group. So (Refer image) is more due to high $$+H$$ effect ( hyperconjugation effect )
Question 3
1 / -0

The basic character of amines is due to:

A
tetrahedral structure

B
presence of nitrogen atom

C
lone pair of electrons on nitrogen atom

D
high electronegativity of nitrogen

Solution

The basic character of amines is due to lone pair of electrons on nitrogen atom.

This lone pair of electrons can be easily donated.

Hence, amines are Lewis bases.

Amines accepts a proton from acid.

Option C is correct.
Question 4
1 / -0

Compound $$C$$ in the above reaction is:

A

B

C

D

Solution

In this reaction alkyl halide is converted to primary amine. This reaction is also called Gabriel Thalimide Synthesis.
Question 5
1 / -0

What will be the product $$W$$ in the above reaction?

A

B

C

D

Solution
Question 6
1 / -0

Which nitrogen is maximum basic?

A
$$1$$

B
$$2$$

C
$$3$$

D
All are equally basic

Solution

The more basic nitrogen is "2" because the nitrogen at '1' is involved in resonance with the benzene ring and nitrogen at '3' is in resonance with carbonyl carbon and is slightly $$sp^2$$.

But nitrogen at '2' position is $$sp^3$$ hybridized and hence is more basic.

Hence the correct option is B.
Question 7
1 / -0

Choose the false statement.

A
$$-NH_2$$ is strongly activating while $$-NHCOCH_3$$ is activating

B
$$-NO_2$$ is strongly deactivating while $$-CHO$$ is deactivating

C
$$-NH\underset{\underset{\displaystyle O}{||}}{C}R$$ and $$-CH=O$$ are m-directing

D
$$-CF_3$$ and $$-\underset{\underset{\displaystyle O}{||}}{C}R$$ are m-directing
Question 8
1 / -0

In the above reaction, the product $$B$$ is:

A

B

C

D
none of the above

Solution
Question 9
1 / -0

What is the name for red azo dye?

A
p-hydroxy azo benzene

B
$$\beta$$- nathyl azo benzene

C
p-amino azo benzene

D
p- N, N dimethyl amino azo benzene

Solution

(A)This answer is given to the image.
Question 10
1 / -0

A definite amount of solid $${ NH }_{ 4 }HS$$ is placed in a flask already containing ammonia gas at a certain temperature and $$0.50atm$$ pressure. $${ NH }_{ 4 }HS$$ decomposes to give $${ NH }_{ 4 }HS$$ decomposes to give $${ NH }_{ 3 }$$ and $${ H }_{ 2 }S$$ and at equilibrium total pressure in flask is $$0.84atm$$. The equilibrium constant for the reaction is:

A
$$0.30$$

B
$$0.18$$

C
$$0.17$$

D
$$0.11$$