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CBSE 12th Standard Chemistry Subject Amines Ncert Exemplar MCQ Questions With Solution 2021

Published on: 24/05/2021

QB365 Provides the updated NCERT Exemplar Questions for Class 12, and also provide the detail solution for each and every case study questions. NCERT Exemplar questions are latest updated question pattern from NCERT, QB365 will helps to get more marks in Exams

Download CBSE Class 12th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Chemistry

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Std: 12th Standard CBSE - Chemistry

chapter: - NCERT Exemplers

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Questions:

Multiple Choice Question

5 x 1 = 5

The best reagent for converting, 2-phenylpropanamide into 1-phenylethanamine is.................................. .

(a)

excess H₂/Pt

(b)

NaOH/Br₂

(c)

NaBH₄/methanol

(d)

LiAIH₄/ether

The best reagent for converting 2-phenylpropanamide into 2-phenylpropanamine is........................... .

(a)

excess H₂

(b)

Br₂ in aqueous NaOH

(c)

iodine in the presence of red phosphorus

(d)

LiAlH₄ in ether

In order to prepare a \({ 1 }^{ \circ }\) amine from an alkyl halide with simultaneous addition of one -CH₂ group in the carbon chain, the reagent used as source of nitrogen is ___________ .

(a)

Sodium amide, NaNH₂

(b)

Sodium azide, NaN₃

(c)

Potassium cyanide, KCN

(d)

Potassium phthalimide, C₆H₆(CO)₂N^-K⁺

Benzylamine may be alkylated as shown in the following equation:

C₆H₅CH₂NH₂+R-X \(\longrightarrow \) C₆H₅CH₂NHR

Which of the following alkyl halides is best suited for this reaction through S_N 1 mechanism?

(a)

CH₃Br

(b)

C₆H₅Br

(c)

C₆H₅CH₂Br

(d)

C₂H₅Br

The correct IUPAC name for CH₂=CHCH₂NHCH₃ is

(a)

Allylmethylamine

(b)

2-amino-4-pentene

(c)

4-aminopent-1-ene

(d)

N-methylprop-2-en-1-amine

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Answers Key:

Multiple Choice Question

5 x 1 = 5

(b)
NaOH/Br₂

(d)
LiAlH₄ in ether

Since C₆H₅CH₂Br on ionization gives a resonance stabilized benzyl carbocation \(\left( { C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }^{ + } \right) \) , therefore, C₆H₅CH₂Br is best suited for S_N1 reaction.