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

A primary alkyl halide would prefer to undergo ______.

Advertisements
Advertisements

प्रश्न

A primary alkyl halide would prefer to undergo ______.

पर्याय

  • SN1 reaction

  • SN2 reaction

  • α–Elimination

  • Racemisation

MCQ
रिकाम्या जागा भरा
Advertisements

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).

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १३७]

APPEARS IN

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

संबंधित प्रश्‍न

Write the structure of an isomer of compound C4H9Br which is most reactive towards SN1 reaction


Write the major products(s) in the following:


Write the main products when methyl chloride is treated with AgCN.


Given reasons: C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH3–Cl.


Which would undergo SN2 reaction faster in the following pair and why ?


Write the isomers of the compound having the formula C4H9Br.


Which compound in the following pair will react faster in SN2 reaction with OH?

(CH3)3CCl or CH3Cl


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

\[\ce{CH3CH2Br + KCN ->[aq{.} ethanol]}\]


C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH3–Cl.


In a coordination entity of the type [PtCl2(en)2]2+ which isomer will show optical isomerism?


In the reaction, \[\ce{R - X + NaOR' -> ROR’ + X}\] ( – ve ion). The main product formed is:


Optically active isomers but not mirror images are called ____________.


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.


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.


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


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

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


Convert bromoethane to propanamine.


 Acetic anhydride from acetic acid


Discuss the mechanism of alkaline hydrolysis of methyl bromide.


Consider the reactions,

(i) \[\begin{array}{cc}
\phantom{}\ce{\underset{}{(CH3)2CH - CH2Br} ->[C2H5OH] \underset{}{(CH3)2CH - CH2OC2H5 + HBr}}\\
\end{array}\]

(ii) \[\begin{array}{cc}
\phantom{}\ce{\underset{}{(CH3)2CH - CH2Br} ->[C2H5O-] \underset{}{(CH3)2CH - CH2OC2H5 + Br-}}\\
\end{array}\]

The mechanisms of reactions (i) and (ii) are respectively:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×