Carboxylic Acids & Their Derivatives Test

Result

Carboxylic Acids & Their Derivatives Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

The yield of ester in esterification can be increased by

A
all the above factors

B
removing water

C
taking acetic acid in excess

D
taking ethanol in excess

Solution

CH₃CH₂OH + CH₃COOH CH₃COOCH₂CH₃ + H₂O

The yield of product in a reversible reaction can be increased by (i) removing one of the products,

(ii) taking either of the reactant in excess.
Question 2
1 / -0

Pick up the compound which responds to aldol condensation but not Claisen condensation.
Note: Both aldol and Claisen condensations are given by compounds having α-hydrogen atom to a C = O group.
CH3CH₂COOC₂H₅ (CH₃)₂CHCOOC₂H₅ (CH3)₃CCOOC₂H₅
I II III

A
III

B
None of the three

C
II

D
II and III

Solution

For aldol condensation, the reactant should have at least one (not necessarily two) α-H, while for Claisen condensation, reactant (ester) should have two α-H's.