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

Assertion: KCN reacts with methyl chloride to give methyl isocyanide. Reason: CN– is an ambident nucleophile.

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प्रश्न

Assertion: KCN reacts with methyl chloride to give methyl isocyanide.

Reason: CN is an ambident nucleophile.

विकल्प

  • Assertion and reason both are correct and reason is correct explanation of assertion.

  • Assertion and reason both are wrong statements.

  • Assertion is correct but reason is wrong statement.

  • Assertion is wrong but reason is correct statement.

  • Assertion and reason both are correct statements but reason is not correct explanation of assertion.

MCQ
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उत्तर

Assertion is wrong but reason is correct statement.

Explanation:

\[\ce{\underset{Alkyl cyanide}{R - Cl + KCN –> R - CN + KCl}}\]

Isocyanide is not obtained in this reaction. CN is an ambident nucleophile.

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अध्याय 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १४८]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 10 Haloalkanes and Haloarenes
Exercises | Q V. 87. | पृष्ठ १४८

संबंधित प्रश्न

Write the major products(s) in the following:


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In the following pair of halogen compounds, which compound undergoes a faster SN1 reaction?


SN1 reactions are accompanied by racemization in optically active alkyl halides.


What is the action of the following on ethyl bromide:
moist silver oxide


AgCN reacts with haloalkanes to form isocyanide. Haloalkanes react with KCN to form alkyl cyanides as the main product. Why?


Which of the following is an example of SN2 reaction?


Which one of the following halogen compounds is difficult to be hydrolysed by SN1 mechanism?


An important chemical method to resolve a racemic mixture makes use of the formation of ______.


Which of the following alkyl halides will undergo SN1 reaction most readily?


Which of the following compounds will give a racemic mixture on nucleophilic substitution by OH ion?

1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene


Which of the statements are correct about above reaction?

(i) (a) and (e) both are nucleophiles.

(ii) In (c) carbon atom is sp3 hybridised.

(iii) In (c) carbon atom is sp2 hybridised.

(iv) (a) and (e) both are electrophiles.


Which of the following statements are correct about the kinetics of this reaction?

(i) The rate of reaction depends on the concentration of only (b).

(ii) The rate of reaction depends on concentration of both (a) and (b).

(iii) Molecularity of reaction is one.

(iv) Molecularity of reaction is two.


Which one is the correct order of nucleophilic strength (pKa) of following nucleophiles?


Which of the following compounds will show retention in configuration on nucleophile substitution by OH ion?


In SN1 reactions, the correct order of reactivity for the following compounds:

CH3Cl, CH3CH2Cl, (CH3)2CHCl and (CH3)3CCl is ______.


The decreasing order of reactivity of the following compounds towards nucleophilic substitution (SN2) is ______.






Complete the reaction with the main product formed:


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