Amines - Gujarat Board (GSEB) STD 12 Science Chemistry Questions - Vidyadip

Question types

Amines question types

93 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

93

Questions

6

Question groups

5

Question types

2 Marks Questions

3 Marks Question

1 Marks Question

M.C.Q (1 Marks)

5 Marks Questions

Fill in the blank.

Sample Questions

Amines questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 12 Marks Questions2 Marks

Compound (A) is formed when aniline is treated with $NaNO _2+ HCl$ at 273-278 K. Compound (B) is formed when cuprous chloride is added to (A).
Write the name of compound (A) and (B) and the equations of the chemical reactions involved.

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Q 22 Marks Questions2 Marks

Compound (A) is formed when benzene diazonium chloride is mixed with KI solution. Compound (B) is formed when ( A ) reacts with sodium in the presence of dry ether. Write the names of (A) and (B) and the equations of the chemical reactions involved.

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Q 32 Marks Questions2 Marks

Explain isocyanide test for primary amines.

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Q 42 Marks Questions2 Marks

Draw the pyramidal shape of trimethyl amine.

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Q 52 Marks Questions2 Marks

Two isomeric compounds (A and B) have $C _4 H _{11} N$ molecular formula react with $HNO _2$ and forms compounds (C) and (D). C is hardly oxidised but it reacts immediately with Lucas reagent whereas $D$ reacts with Lucas reagent in 5 minutes and it also gives haloform reaction. Identify $A, B, C$ and $D$.

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Q 63 Marks Question3 Marks

How do you prepare p-bromoaniline and o-bromoaniline from aniline? Explain.

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Q 73 Marks Question3 Marks

Write the reaction of methyl amine with the following :
(i) $HAuCl _4$
(ii) $H _2 PtCl _6$
(iii) $CH _3 COCl$
(iv) $C _6 H _5 COCl$

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Q 83 Marks Question3 Marks

Write the equations of the reactions of forming primary amines by the following methods:
(a) Hydrolysis of alkyl isocyanide
(b) Reductive amination of carbonyl compounds
(c) Alkaline hydrolysis of alkyl isocyanate

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Q 93 Marks Question3 Marks

Give equations required for the following changes:
(i) Ethanal to methanamine
(ii) Ethanocyl chloride to methanamine
(iii) Ethanoic acid to propan-1-amine.

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Q 101 Marks Question1 Mark

Cyclohexanamine

is more basic than benzenamine

why?

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Q 111 Marks Question1 Mark

How is phenyl isocyanide prepared from benzene? Write the required reaction sequence.

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Q 121 Marks Question1 Mark

Convert nitrobenzene into benzene.

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Q 131 Marks Question1 Mark

Ethanamine is completely soluble in water, whereas benzenamine (aniline) is almost insoluble in water, why?

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Q 141 Marks Question1 Mark

Write the reaction sequence required to convert methanamine into ethane nitrile.

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Q 15M.C.Q (1 Marks)1 Mark

Secondary amine among the following is :

A
Propan-2-amine
B
Pentan-3-amine
✓
N-Methylethanamine
D
N, N-Dimethylmethanamine

Answer: C.

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Q 16M.C.Q (1 Marks)1 Mark

The compound showing highest basic strength in aqueous solution is :

A
$\left( C _2 H _5\right)_3 N$
✓
$\left( C _2 H _5\right)_2 NH$
C
$C _2 H _5 NH _2$
D
$NH _3$

Answer: B.

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Q 17M.C.Q (1 Marks)1 Mark

The hybridisation state of nitrogen in trimethylamine is :

A
sp
B
$sp ^2$
✓
$sp ^3$
D
$dsp ^2$

Answer: C.

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Q 18M.C.Q (1 Marks)1 Mark

The amine with lowest $pK _{ b }$ is :

A
$CH _3 NH _2$
✓
$\left( CH _3\right)_2 NH$
C
$\left( CH _3\right)_3 N$
D
$C _6 H _5 NH _2$

Answer: B.

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Q 19M.C.Q (1 Marks)1 Mark

When benzene diazonium salt reacts with phenol 16 forms a dyne. This reaction is called :

A
Diazotization reaction
B
Condensation reaction
✓
Coupling reaction
D
Acetylation

Answer: C.

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Q 205 Marks Questions5 Marks

Expian the basic properties of amines.

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Q 215 Marks Questions5 Marks

How are different aromatic compounds synthesized by benzene diazonium chloride? Explain with examples.

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Q 225 Marks Questions5 Marks

Explain the electrophilic substitution reactions of amine.

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Q 235 Marks Questions5 Marks

Discuss the different chemical properties of amines.

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Q 245 Marks Questions5 Marks

Explain the effect of substitutents on the basic strength of aromatic amines.

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Q 25Fill in the blank.1 Mark

On reaction of ethyl alcohol with Benzene diazonium chloride ___________ is formed.

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Q 26Fill in the blank.1 Mark

____________ is formed when KI reacts with Benzene diazonium chloride.

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Q 27Fill in the blank.1 Mark

Sandmeyer reaction is used to prepare chlorobenzene, _____________ and ___________ .

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Q 28Fill in the blank.1 Mark

Benzene diazonium chloride on reaction with phenol in a basic medium (NaOH) gives _________ .

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Q 29Fill in the blank.1 Mark

__________ is formed when benzene diazonium chloride is reacted and heated with hydrofluoroboric acid.

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