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

Benzylamine may be alkylated as shown in the following equation: CX6HX5CHX2NHX2+R−X⟶CX6HX5CHX2NHR Which of the following alkylhalides is best suited for this reaction through SN1 mechanism? - Chemistry

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प्रश्न

Benzylamine may be alkylated as shown in the following equation:

\[\ce{C6H5CH2NH2 + R - X -> C6H5CH2NHR}\]

Which of the following alkylhalides is best suited for this reaction through SN1 mechanism?

पर्याय

  • \[\ce{CH3Br}\]

  • \[\ce{C6H5Br}\]

  • \[\ce{C6H5CH2Br}\]

  • \[\ce{C2H5Br}\]

MCQ
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उत्तर

\[\ce{C6H5CH2Br}\]

Explanation:

SN1 reaction occurs in two steps. In first step R – X bond is broken to produce a carbocation which is attacked by nucleophile. The greater the stability of carbocation, the greater will be the rate of reaction. Benzylic halides show high reactivity towards SN1 reaction.

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पाठ 13: Amines - Multiple Choice Questions (Type - I) [पृष्ठ १८१]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 13 Amines
Multiple Choice Questions (Type - I) | Q 5 | पृष्ठ १८१

संबंधित प्रश्‍न

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


Write a short note on the following:

Hoffmann’s bromamide reaction


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

\[\ce{C6H5N2Cl ->[CuCN] A ->[H2O/H+] B ->[NH3][\Delta] C}\]


Why cannot aromatic primary amines be prepared by Gabriel phthalimide synthesis?


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.

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


Write the order of reactivity of alkyl halides with ammonia.


Explain Hoffmann’s exhaustive alkylation with suitable reactions.


Which of the following amines exhibits maximum degree of intermolecular hydrogen bonding?


What product is formed when \[\ce{R - C ≡ N}\] is hydrolysed?


Which nitrogen containing compound amongst the following would undergo Mendius reduction to furnish primary amine \[\ce{(R - NH2)}\]?


Identify product B in the following reaction.

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


Which of the following reagents is used in Hofmann's elimination reaction of amines?


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Alkyl halides are insoluble in water.

Reason (R): Alkyl halides have halogen attached to sp3 hybrid carbon.

Select the most appropriate answer from the options given below:


Which of the following compounds is the weakest Brönsted base?


Write following conversions:

nitrobenzene `->` acetanilide


Assertion: Aromatic 1° amines can be prepared by Gabriel Phthalimide Synthesis.

Reason: Aryl halides undergo nucleophilic substitution with anion formed by phthalimide.


Describe Gabriel's phthalimide synthesis. (Give reaction)


Amides can be converted into amines by the reaction named ______.


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