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Which of the following on heating with aqueous KOH, produces acetaldehyde ? (1) CH3COCl (2) CH3CH2Cl (3) CH2ClCH2Cl (4) CH3CHCl2

Which of the following on heating with aqueous KOH, produces acetaldehyde ?
(1) CH3COCl
(2) CH3CH2Cl
(3) CH2ClCH2Cl
(4) CH3CHCl2

Grade:12

2 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Dear student

The answer is option d

Regards
Vikas TU
14149 Points
3 years ago
Ans is c
The geminal dihalides are boiled with aqueous KOH or NaOH. It produces aldehydes and ketones. geminal dihalide (R-CHX2) having two halogen atoms situated on terminal carbon atom, are hydrolysed by aq. KOH or aq. NaOH first produced a unstable dihydroxy compound. Then converts into an aldehyde by loss of water molecule.
1-1- dichloroethane is germinal dihalide which react with KOH and produce unstable hydroxyl compound then loss of water molecule acetaldehyde produce
 

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