Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Hoffmann Bromamide Degradation reaction is shown by ______.

Reduction of aromatic nitro compounds using \[\ce{Fe}\] and \[\ce{HCl}\] gives ______.

Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is ______.

Which of the following compounds is the weakest Brönsted base?

Among the following amines, the strongest Brönsted base is:

Which of the following methods of preparation of amines will give same number of carbon atoms in the chain of amines as in the reactant?

Reduction of nitrobenzene by which of the following reagent gives aniline?

(i) \[\ce{Sn/HCl}\]

(ii) \[\ce{Fe/HCl}\]

(iii) \[\ce{H2 - Pd}\]

(iv) \[\ce{Sn/NH4OH}\]

The reagents that can be used to convert benzenediazonium chloride to benzene are:

(i) \[\ce{SnCl2/HCl}\]

(ii) \[\ce{CH3CH2OH}\]

(iii) \[\ce{H3PO2}\]

(iv) \[\ce{LiAlH4}\]

Which of the following amines can be prepared by Gabriel synthesis.

(i) Isobutyl amine

(ii) 2-Phenylethylamine

(iii) N-methylbenzylamine

(iv) Aniline

Which of the following reactions are correct?

(i)

(ii)

(iii)

(iv)

Under which of the following reaction conditions, aniline gives p-nitro derivative as the major product?

(i) Acetyl chloride/pyridine followed by reaction with conc.\[\ce{H2SO4 }\] + conc. \[\ce{HNO3}\].

(ii) Acetic anyhdride/pyridine followed by conc.\[\ce{H2SO4}\] + conc.\[\ce{HNO3}\].

(iii) Dil. HCl followed by reaction with conc.\[\ce{H2SO4}\] + conc.\[\ce{HNO3}\].

(iv) Reaction with conc.\[\ce{HNO3}\] + conc.\[\ce{H2 SO4}\].

What is the product when \[\ce{C6H5CH2NH2}\] reacts with \[\ce{HNO2}\]?

What is the best reagent to convert nitrile to primary amine?

Suggest a route by which the following conversion can be accomplished.

Identify A and B in the following reaction.

Write following conversions:

nitrobenzene `->` acetanilide

Write following conversions:

acetanilide `->` p-nitroaniline

How will you bring out the following conversion?

How will you carry out the following conversion?

How will you carry out the following conversion?