Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

Explain: (i)The treatment of alkyl chlorides with aqKOH leads to the formation of alcohols,but in the presence of alcoholic KOH,alkenes are formed. (ii)Out of C6H5CH2Cl and C6H5ClC6H5 which is more easily hydrolysed by aqKOH and why?
Asked by banga71 | 13 Jan, 2018, 11:32: AM
answered-by-expert Expert Answer

(1) Alkyl chloride in presence of aqueous KOH gives the substituted product. In an aqueous solution, KOH completely ionizes to give hydroxide ions. OH- ion is a strong nucleophile, which can easily substitute the strong leaving chloride ion and leads to the formation of alcohol.

 R minus C l space space plus space a q. space K O H space rightwards arrow with blank on top space space R minus O H space space plus space space K C l
On other hand alkyl chloride containing β-hydrogen atom with alcoholic KOH solution undergo elimination reaction to give alkene as a major products. An alcoholic solution of KOH produce alkoxide (RO- ) ion, which is a strong base. It can easily abstract a β-carbon of alkyl chloride and form an alkene as a major product.
 R minus C H subscript 2 minus C H subscript 2 minus C l space space plus space space a l c o. K O H space rightwards arrow with blank on top space space R minus C H equals C H subscript 2 space space plus space space K C l space space plus space H subscript 2 O space space space space space space space space beta space space space space space space space space space space alpha
 
(2) 
Answered by Ramandeep | 15 Jan, 2018, 09:42: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Chemistry
how can you obtain benzonitrile from bromo benzene
Asked by surajbhanupatro44 | 07 Nov, 2023, 12:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
find the major product
question image
Asked by mayamishra9540500880 | 04 Jul, 2022, 07:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
which of the following is most reactive towards sn2
Asked by harshaldpathak | 11 Jun, 2022, 05:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
aadr
question image
Asked by ap650712 | 26 Jun, 2021, 10:00: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
what is the main product??
question image
Asked by amitkumar.cis | 01 Jan, 2021, 09:15: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What is the correct option?
question image
Asked by me.mirzainayat | 14 Nov, 2020, 07:31: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What is sayteffzz rule with an example ?
Asked by Prachidewangan74 | 02 Oct, 2020, 03:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
what happens when acetyl chloride is treated with excess of CH3MgI
Asked by sujithanathan119 | 01 Jun, 2020, 12:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Outline the preparation of following compounds using a nucleophilic substitution reaction CH3CΞCCH2CH3
Asked by ng9045007209 | 21 May, 2020, 07:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
mono clorination of cyclo hexane results in how many products 16 and 17 questions
question image
Asked by gangavaramouni | 26 Mar, 2020, 10:33: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×