KC+CET PYQs for Aldehydes, Ketones and Carboxylic Acids with Solutions: Practice KCET Previous Year Questions

Updated on - Feb 16, 2026

Aldehydes, Ketones and Carboxylic Acids is an important topic in the Chemistry section in KCET exam. Practising this topic will increase your score overall and make your conceptual grip on KCET exam stronger.

This article gives you a full set of KCET PYQs for Aldehydes, Ketones and Carboxylic Acids with explanations for effective preparation. Practice of KCET Chemistry PYQs including Aldehydes, Ketones and Carboxylic Acids questions regularly will improve accuracy, speed, and confidence in the KCET 2026 exam.

KCET PYQs for Aldehydes, Ketones and Carboxylic Acids with Solutions

1.
A Lewis acid 'X' formed by the reaction of BF3 with LiA/H₄ in ether medium to gives a highly toxic gas. This gas when heated with NH₃ gives a compound commonly known as inorganic benzene. The gas is
- BF₃
- B₂O₃
- B₂H₆
- B₂N₃H₆
View Solution
2.
Select the $pK_a$ value of the strongest acid from the following :
- 2
- 4
- 1
- 3
View Solution
3.
$ {CH_3COOH ->[LiA/H_4] X ->[Cu][300 ^{\circ}C] Y ->[dilute][NaOH] Z}$ In the above reaction $Z$ is
- Ketol
- Acetal
- Butanol
- Aldol
View Solution
4.
A metal exists as an oxide with formula M_0.96O. Metal M can exist as M⁺² and M⁺³ in its oxide M0.96O. The percentage of M⁺³ in the oxide is nearly
- 9.6%
- 8.3%
- 4.6%
- 5%
View Solution
5.
Benzoin is :
- $\alpha$ - hydroxy aldehyde
- $\alpha$ - hydroxy ketone
- compound containing an aldehyde and a ketonic group
- $\alpha,\beta$ - unsaturated acid
View Solution
6.
The acid strength of active methylene group in (I) $CH_3COCH_2COOC_2H_5$ (II) $CH_3COCH_2COCH_3$ (III) $C_2H_5OOCCH_2COOC_2H_5$ decreases as
- I > II > III
- III > I >II
- III > II > I
- II > I > III
View Solution
7.
Predict the product $C$ in the following series of reactions : $CH _{3}- COOH \stackrel{ PCl _{ 5 }}{\longrightarrow} A { ->[{C_6H_6}][{{\text{Anhyd}} . Alcl_3}] } B { ->[CH_3MgBr] C}$
- $ CH_3 CH(OH)C_6H_5$
- $ CH_3CH(OH)C_2H_5$
- $ (CH_3)_2C(OH)C_6H_5$
View Solution
8.
Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?
- Benzyl alcohol
- Acetophenone
- Anisole
- Toluene
View Solution
9.
Organic acid without a carboxylic acid group is
- ascorbic acid
- vinegar
- oxalic acid
- picric acid
View Solution
10.
The oxide of potassium that does not exist is
- K₂O₃
- K₂O
- KO₂
- K₂O₂
View Solution

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KCET PYQs for Aldehydes, Ketones and Carboxylic Acids with Solutions: Practice KCET Previous Year Questions

KCET PYQs for Aldehydes, Ketones and Carboxylic Acids with Solutions

1.
A Lewis acid 'X' formed by the reaction of BF3 with LiA/H₄ in ether medium to gives a highly toxic gas. This gas when heated with NH₃ gives a compound commonly known as inorganic benzene. The gas is

2.
Select the $pK_a$ value of the strongest acid from the following :

3.
$ {CH_3COOH ->[LiA/H_4] X ->[Cu][300 ^{\circ}C] Y ->[dilute][NaOH] Z}$ In the above reaction $Z$ is

4.
A metal exists as an oxide with formula M_0.96O. Metal M can exist as M⁺² and M⁺³ in its oxide M0.96O. The percentage of M⁺³ in the oxide is nearly

5.
Benzoin is :

6.
The acid strength of active methylene group in (I) $CH_3COCH_2COOC_2H_5$ (II) $CH_3COCH_2COCH_3$ (III) $C_2H_5OOCCH_2COOC_2H_5$ decreases as

7.
Predict the product $C$ in the following series of reactions : $CH _{3}- COOH \stackrel{ PCl _{ 5 }}{\longrightarrow} A { ->[{C_6H_6}][{{\text{Anhyd}} . Alcl_3}] } B { ->[CH_3MgBr] C}$

8.
Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?

9.
Organic acid without a carboxylic acid group is

10.
The oxide of potassium that does not exist is

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KCET PYQs for Aldehydes, Ketones and Carboxylic Acids with Solutions

1.A Lewis acid 'X' formed by the reaction of BF3 with LiA/H4 in ether medium to gives a highly toxic gas. This gas when heated with NH3 gives a compound commonly known as inorganic benzene. The gas is

2.Select the $pK_a$ value of the strongest acid from the following :

3.$ {CH_3COOH ->[LiA/H_4] X ->[Cu][300 ^{\circ}C] Y ->[dilute][NaOH] Z}$ In the above reaction $Z$ is

4.A metal exists as an oxide with formula M0.96​O. Metal M can exist as M+2 and M+3 in its oxide M0.96​O. The percentage of M+3 in the oxide is nearly

5.Benzoin is :

6.The acid strength of active methylene group in (I) $CH_3COCH_2COOC_2H_5$ (II) $CH_3COCH_2COCH_3$ (III) $C_2H_5OOCCH_2COOC_2H_5$ decreases as

7.Predict the product $C$ in the following series of reactions : $CH _{3}- COOH \stackrel{ PCl _{ 5 }}{\longrightarrow} A { ->[{C_6H_6}][{{\text{Anhyd}} . Alcl_3}] } B { ->[CH_3MgBr] C}$

8.Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?

9.Organic acid without a carboxylic acid group is

10.The oxide of potassium that does not exist is

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1.
A Lewis acid 'X' formed by the reaction of BF3 with LiA/H₄ in ether medium to gives a highly toxic gas. This gas when heated with NH₃ gives a compound commonly known as inorganic benzene. The gas is

2.
Select the $pK_a$ value of the strongest acid from the following :

3.
$ {CH_3COOH ->[LiA/H_4] X ->[Cu][300 ^{\circ}C] Y ->[dilute][NaOH] Z}$ In the above reaction $Z$ is

4.
A metal exists as an oxide with formula M_0.96O. Metal M can exist as M⁺² and M⁺³ in its oxide M0.96O. The percentage of M⁺³ in the oxide is nearly

5.
Benzoin is :

6.
The acid strength of active methylene group in (I) $CH_3COCH_2COOC_2H_5$ (II) $CH_3COCH_2COCH_3$ (III) $C_2H_5OOCCH_2COOC_2H_5$ decreases as

7.
Predict the product $C$ in the following series of reactions : $CH _{3}- COOH \stackrel{ PCl _{ 5 }}{\longrightarrow} A { ->[{C_6H_6}][{{\text{Anhyd}} . Alcl_3}] } B { ->[CH_3MgBr] C}$

8.
Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?

9.
Organic acid without a carboxylic acid group is

10.
The oxide of potassium that does not exist is