मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Which of the following compounds is the weakest Brönsted base?

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प्रश्न

Which of the following compounds is the weakest Brönsted base?

पर्याय

MCQ
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उत्तर

Explanation:

Amines (i, ii) have stronger tendency to accept a proton and hence are stronger Bronsted bases than phenol (iii) and alcohol (iv). Since phenol is more acidic than alcohol, therefore, phenol (iii) has the least tendency to accept a proton and hence it is the weakest Bronsted base.

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पाठ 13: Amines - Multiple Choice Questions (Type - I) [पृष्ठ १८४]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 13 Amines
Multiple Choice Questions (Type - I) | Q 23 | पृष्ठ १८४

संबंधित प्रश्‍न

How is ethyl amine prepared from methyl iodide?


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

\[\ce{CH3COOH ->[NH3][\Delta] A ->[NaOBr] B ->[NaNO2/HCl] C}\]


Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.


Answer the following

Identify A and B in the following reactions.

\[\ce{C6H5CH2Br->[alco.][KCN]A ->[Na/ethanol]B.}\]


Answer the following

Explain Gabriel phthalimide synthesis.


Explain Hoffmann’s exhaustive alkylation with suitable reactions.


Explain the following reaction with a suitable example.

Hofmann elimination reaction


Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide.


____________ can be prepared exclusively by Gabriel phthalimide synthesis.


Which of the following reagents is used in Mendius reduction reaction of alkyl cyanide?


Identify product B in the following reaction.

\[\ce{Aniline ->[NaNO2][HCl] A ->[KI] B}\]


Amongst the following, the strongest base in aqueous medium is ______.


In order to prepare a 1° amine from an alkyl halide with simultaneous addition of one \[\ce{CH2}\] group in the carbon chain, the reagent used as source of nitrogen is ______.


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


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nitrobenzene `->` acetanilide


Match the reactions given in Column I with the statements given in Column II.

  Column I   Column II
(i) Ammonolysis (a) Amine with lesser number of carbon atoms
(ii) Gabriel phthalimide synthesis (b) Detection test for primary amines.
(iii) Hoffmann Bromamide reaction (c) Reaction of phthalimide with \[\ce{KOH}\] and \[\ce{R-X}\]
(iv) Carbylamine reaction (d) Reaction of alkylhalides with \[\ce{NH3}\]

Assertion: Only a small amount of \[\ce{HCl}\] is required in the reduction of nitro compounds with iron scrap and \[\ce{HCl}\] in the presence of steam.

Reason: \[\ce{FeCl2}\] formed gets hydrolysed to release \[\ce{HCl}\] during the reaction.


A primary amine is formed by an amide on treatment with bromine and alkali. The primary amine has


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Write short note on the following:

Ammonolysis


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