List of top Chemistry Questions on Preparation of Amines

Identify the product B in following reaction.
\(\text{CH}_3\text{Br}\overset{\text{KCN}\,}{\rightarrow }\text{A}\rightarrow _{\text{C}_2\text{H}_5\text{OH}\,}^{\text{Na}\,}\text{B}\)

What is the number of moles of hydrogen atoms needed to obtain one mole ethanamine from acetamide using \(\text{LiAl H}_4\) /ether as reducing agent.

Identify false statement from following regarding preparation of amines by Hofmann degradation method.

Identify the product 'B' in the following reaction
\(\text{CH}_3-\text{I}\overset{\text{KCN}\,}{\rightarrow }\text{A}\overset{\text{Na/C}_2\text{H}_5\text{OH}\,}{\rightarrow }\text{B}\)

Which of the following amines is not obtained by Gabriel phthalimide synthesis?

Which of the following reagents is used to convert -CN group to -\(\text{CH}_2\text{NH}_2\) group?

Identify the product obtained when RCN is treated with sodium and alcohol.

Write the structures of A, B and C in the following reaction:

In the reaction of \( NaOBr \) with amide, the carbonyl carbon is lost as :

Assertion (A): Aromatic primary amines can be prepared by Gabriel Phthalimide synthesis.
Reason (R): Aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.

Identify the compound produced by the reduction of Ethanenitrile with Lithium aluminium hydride:

Assertion (A) : Aromatic primary amines can be prepared by Gabriel Phthalimide synthesis.
Reason (R) : Aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.

Identify the compound produced by the reduction of Ethanenitrile with Lithium aluminium hydride :

Explain the following : Hoffmann's bromamide degradation reaction

The reaction of ammonia with a large excess of ethyl chloride will give mainly :

Acetamide reacts with $Br_{2}$ and aqueous KOH to form :

Which of the following reagents are used to prepare primary amines by Hoffmann bromamide degradation reaction ?
(i) \( \text{R}-\text{C}(=\text{O})-\text{NH}_2 \)
(ii) NaOH
(iii) \( \text{Br}_2 \)
(iv) \( \text{CHCl}_3 \)

Which of the following reagents are used to prepare primary amines by Hoffmann bromamide degradation reaction ? \[ (i)\quad \begin{array}{c} O\\ || \end{array} R-C-NH_2 \] \[ (ii)\quad NaOH \] \[ (iii)\quad Br_2 \] \[ (iv)\quad CHCl_3 \]

Assertion (A) : Aromatic primary amines can easily be prepared by Gabriel phthalimide synthesis. Reason (R) : Gabriel phthalimide synthesis is used to prepare only aliphatic primary amines.

Assertion (A): Aromatic primary amines cannot be prepared by Gabriel phthalimide synthesis. Reason (R): Gabriel phthalimide synthesis is used for the preparation of primary aliphatic amines.

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नीचे दिए गए विकल्पों में से सही उत्तर चुनिए।

Identify the reactions which give aniline as the major product.

Consider the following reactions. Total number of electrons in the \(\pi\)-bonds and lone pair of electrons in the product (X) is :}

The incorrect statement from the following with respect to carbohydrates is:

Identify 'B' in the following sequence of reactions: Acetic acid $\xrightarrow{Thionyl~chloride}$ A $\xrightarrow{Ammonia}$ B}