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Standard XII

Chemistry

Polyhalogen Compounds

3-Hydroxybuta...

Question

3-Hydroxybutanal is formed when (X) reacts with (Y) in dilute (Z) solution. What are X, Y and Z ?

C H_{3} C H O

(C H_{3})_{2} C O, N a O H

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C H_{3} C H O

C H_{3} C H O

NaCl

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(C H_{3})_{2} C O

(C H_{3})_{2} C O

HCl

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C H_{3} C H O

C H_{3} C H O

NaOH

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Solution

The correct option is D $C H_{3} C H O$ $C H_{3} C H O$ NaOH
D
Aldol condensation. Neucleophilic addition of $C H_{2}^{-}$ group on carbonyl group.

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Similar questions

Q. 3 – hydroxyl butanal is formed when X reacts with Y in dilute Z solution. What are X, Y & Z?

C H_{3} C H O

react with aqueous NaOH solution to form

X,Y and Z are three organic compounds. All the three undergo iodoform test .Only Y and Z can react with 2,4 -DNP. Only Z can reduce tollen's reagent. Here X,Y and Z respectively

Q. (a) Write the products formed when

C H_{3} C H O

reacts with the following reagents:
(i)

H C N

(ii)

H_{2} N - O H

(iii)

C H_{3} C H O

in the presence of dilute

N a O H

(b) Give simple chemical tests to distinguish between the following pairs of compounds.
(i) Propanal and Propanone.

Q. Write the products formed when

C H_{3} C H O

reacts with the following reagents:
(i)

H C N

(ii)

H_{2} N - O H

(iii)

C H_{3} C H O

in the presence of dilute

N a O H

(b) Give simple chemical tests to distinguish between the following pairs of compounds:
(i) Benzoic acid and Phenol
(ii) Propanal and Propanone

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3-Hydroxybutanal is formed when (X) reacts with (Y) in dilute (Z) solution. What are X, Y and Z ?

The correct option is D CH3CHO CH3CHO NaOHDAldol condensation. Neucleophilic addition of CH−2 group on carbonyl group.

The correct option is D $C H_{3} C H O$ $C H_{3} C H O$ NaOH
D
Aldol condensation. Neucleophilic addition of $C H_{2}^{-}$ group on carbonyl group.