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

A primary alkyl halide would prefer to undergo ______. - Chemistry

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प्रश्न

A primary alkyl halide would prefer to undergo ______.

पर्याय

  • SN1 reaction

  • SN2 reaction

  • α–Elimination

  • Racemisation

MCQ
रिकाम्या जागा भरा
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उत्तर

A primary alkyl halide would prefer to undergo SN2 reaction.

Explanation:

SN2 type reactions (i.e. bimolecular nucleophilic substitution) proceed in one step and the rate of reaction depends on concentration of alkyl halide as well as nucleophile i.e. r = k[RX][Nu]. It is a second-order reaction. During SN2 reaction, inversion in configuration occurs (viz. starting with dextrorotatory halide a laevorotatory product is obtained and vice-versa).

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पाठ 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १३७]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 10 Haloalkanes and Haloarenes
Exercises | Q I. 16. | पृष्ठ १३७

संबंधित प्रश्‍न

Out of , which is more reactive towards SN1 reaction and why?


Which alkyl halide from the following pair would you expect to react more rapidly by an SN2 mechanism? Explain your answer.

CH3CH2CH2CH2Br or \[\begin{array}{cc}
\ce{CH3CH2CHCH3}\\
\phantom{...}|\\
\phantom{....}\ce{Br}\ 
\end{array}\]


Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH(Br)CH2CH3 + NaOH ->[water]}\]


Arrange the compounds of the following set in order of reactivity towards SN2 displacement:

2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane


Arrange the compounds of the following set in order of reactivity towards SN2 displacement:

1-Bromobutane, 1-Bromo-2, 2-dimethylpropane, 1-Bromo-2-methylbutane, 1-Bromo-3-methylbutane


What happens when chlorobenzene is subjected to hydrolysis?


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


Which of the following pairs is/are correctly matched?

  Reaction Product
I RX + AgCN RNC
II RX + KCN RCN
III RX + KNO2 \[\begin{array}{cc}
\phantom{.......}\ce{O}\\
\phantom{.....}/\\
\ce{R - N}\phantom{....}\\
\phantom{.....}\backslash\backslash\\
\phantom{.......}\ce{O}
\end{array}\]
IV RX + AgNO2 \[\ce{R-O-N=O}\]

Which among MeX, RCH2X, R2CHX and R3CX is most reactive towards SN2 reaction?


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


An organic molecule necessarily shows optical activity if it ____________.


Among the following, the dissociation constant is highest for:


Ethylene chloride and ethylidene chloride are isomers. Identify the correct statements.

(i) Both the compounds form same product on treatment with alcoholic KOH.

(ii) Both the compounds form same product on treatment with aq.NaOH.

(iii) Both the compounds form same product on reduction.

(iv) Both the compounds are optically active.


The major product formed in the following reaction is:


The number of chiral carbons present in the molecule given below is ______.


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






Retention of configuration is observed in ______.


Convert bromoethane to propanamine.


An organic compound A with the molecular formula (+) C4H9Br undergoes hydrolysis to form (+) C4H9OH. Give the structure of A and write the mechanism of the reaction.


The compound that will undergo SN1 reaction with the fastest rate is:


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