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

Which of the following compounds will give racemic mixture on nucleophilic substitution by OHX− ion?

Advertisements
Advertisements

प्रश्न

Which of the following compounds will give racemic mixture on nucleophilic substitution by \[\ce{OH-}\] ion?

(a) \[\begin{array}{cc}
\phantom{}\ce{CH3 - CH - Br}\\
\phantom{}|\\
\phantom{....}\ce{C2H5}\phantom{}
\end{array}\]

 

(b) \[\begin{array}{cc}
\phantom{..}\ce{Br}\\
\phantom{}|\\
\phantom{}\ce{CH3 - C - CH3}\\
\phantom{}|\\
\phantom{....}\ce{C2H5}\phantom{}
\end{array}\]

 

(c) \[\begin{array}{cc}
\phantom{....}\ce{CH3 - CH - CH2Br}\\
\phantom{}|\\
\phantom{....}\ce{C2H5}\phantom{}
\end{array}\]

पर्याय

  • (a)

  • (a), (b), (c)

  • (b), (c)

  • (a), (c)

MCQ
Advertisements

उत्तर

(a)

Explanation:

\[\begin{array}{cc}
\phantom{}\ce{CH3 - CH - Br}\\
\phantom{}|\\
\phantom{....}\ce{C2H5}\phantom{}
\end{array}\]

will give a racemic mixture on nucleophilic substitution by \[\ce{OH-}\] ion since the alkyl halide has a chiral carbon atom. During the SN1 reaction a mixture of enantiomers is formed which are present in equal proportions.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १३८]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 10 Haloalkanes and Haloarenes
Exercises | Q I. 25. | पृष्ठ १३८

संबंधित प्रश्‍न

What happens when \[\ce{CH3 - Br}\] is treated with KCN?


Write the final product(s) in each of the following reactions:


Write the product formed on reaction of D-glucose with Br2 water.


What is Grignard reagent?


Write chemical equation in support of your answer. 
 Out of   Cl and  CH2- Cl,  which one is more reactive towards nucleophilic substitution reaction and why? 


Out of (CH3)3 C-Br and (CH3)3 C-I, which one is more reactive towards SN1 and why? 


Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution.

(a)
(b)
(c)

Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution.

(a)
(b)
(c)

Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution.

(a)
(b)
(c)

Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution.

(a)
(b)
(c)

Haloarenes are less reactive than haloalkanes and haloalkenes. Explain.


Allyl chloride is hydrolysed more readily than n-propyl chloride. Why?


\[\ce{C6H12O6 ->[(Zymase)] A ->[NaOH][\Delta] B + CHI3}\]

The number of carbon atoms present in the product B is:


Why haloarenes are not reactive towards nucleophilic substitution reaction? Give two reactions.


In the reaction, \[\mathrm{CH}_3\mathrm{C}\equiv\mathrm{\overline{C}Na}^++(\mathrm{CH}_3)_2\mathrm{CHCl}\to\] the product formed is ______.


Identify the final product [D] obtained in the following sequence of reactions.

\[\ce{CH3CHO \underset{ii) H2O+}{\overset{i) LiAlH4}{->}} [A] \underset{\triangle}{\overset{H2SO4}{->}} [B]}\]


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×