Carboxylic Acids(11th And 12th > Chemistry ) Questions and answers for exam Preparation

11th And 12th > Chemistry

CARBOXYLIC ACIDS MCQs

Total Questions : 15 | Page 1 of 2 pages

Question 1.

Adipic acid
Terephthalic acid
Phthalic acid
Benzoic acid

Discuss Question

Answer: Option B. -> Terephthalic acid
:
B

It is oxidation and - COOH groups are in para position

Question 2.

HCOOH

Discuss Question

Answer: Option C. ->

:
C

The type acid depends upon R group of Grignard
reagent

Question 3.

A and P are different but C and Q are same
A and P are different but C and Q are different
A and P are same but C and Q are same
C and Q are benzaldehyde

Discuss Question

Answer: Option C. -> A and P are same but C and Q are same
:
C

in oxidation of side chain only one carbon of aromatic ring is retained

Question 4.

When CH₂ = CH - COOH is reduced with LiAlH₄ , the compound formed is

CH₃CH₂CH₂OH
CH₃CH₂CHO
CH₃CH₂COOH
CH₂ = CH - CH₂OH

Discuss Question

Answer: Option D. -> CH₂ = CH - CH₂OH
:
D
LiAlH₄ cannot reduce double bond

Question 5.

Which of the following cannot give benzoic acid on oxidation with alkaline KMnO₄ followed by acidification

Discuss Question

Answer: Option D. ->

:
D

side chain containing 3⁰carbon(or) carbon with out hydrogen will not get oxidised

Question 6.

The acid 'D' obtained through the following
sequence of reactions is

Succinic acid
Malonic acid
Maleic acid
Oxalic acid

Discuss Question

Answer: Option A. -> Succinic acid
:
A

A is ethylene, B is vicdibromide , C is NC - CH₂ - CH₂ -
CN

Question 7.

D A B C
C B D A
D C B A
C A B D

Discuss Question

Answer: Option C. -> D C B A
:
C

B₂H₆ can reduce acid to 1⁰alcohol

Question 8.

Here A, B, X & Y are

X = CH₃COC₂H₅, Y = CH₃COOH, A = C₂H₅OH, B = CH₃COOK
X = CH₃COC₂H₅, Y = C₂H₅OH, A = CH₃COOH, B = CH₃COOK
X = CH₃COCH₃, Y = CH₃COOH, A = CH₃COOK, B = C₂H₅OH
X = CH₃COOC₂H₅, Y = CH₃COOH, A = CH₃COOK, B = C₂H₅OH

Discuss Question

Answer: Option D. -> X = CH₃COOC₂H₅, Y = CH₃COOH, A = CH₃COOK, B = C₂H₅OH
:
D

First reaction saponification of ester & Last reaction is neutralisation

Question 9.

Carboxylic acids are more acidic than phenols, because

The resonance structures of acid are equivalent while those of phenols are non equivalent
In resonance structures of phenols negative charge is on more electro positive carbon while in those of acid it is more electro negative oxygen
None
(a) and (b) above.

Discuss Question

Answer: Option D. -> (a) and (b) above.
:
D

Both a & b plays role in more acidic nature of acids

Question 10.

Acetic acid exists as 'X' in vapour state and 'Y' in the liquid state. 'X' and 'Y' are

Dimer, Polymer
Trimer, Polymer
Hexamer, Polymer
Trimer, Dimer

Discuss Question

Answer: Option A. -> Dimer, Polymer
:
A

In vapour 2 molecules are found together due to inter molecular hydrogen bond & in liquid many molecules are found together due to inter molecular hydrogen bond