Aldehydes, Ketones and Carboxylic Acids Practice Questions - DPP for NEET

 Page 1


PART-I (Single Correct MCQs)
1. Which alkene on ozonolysis gives CH
3
CH
2
CHO and 
?
(a)
(b) CH
3
CH
2
CH = CHCH
2
CH
3
(c) CH
3
CH
2
CH = CH CH
3
(d)
2. Predict the product in the given reaction.
Page 2


PART-I (Single Correct MCQs)
1. Which alkene on ozonolysis gives CH
3
CH
2
CHO and 
?
(a)
(b) CH
3
CH
2
CH = CHCH
2
CH
3
(c) CH
3
CH
2
CH = CH CH
3
(d)
2. Predict the product in the given reaction.
(a) 
(b)
(c)
(d)
3. The carboxyl functional group (– COOH) is present in
(a) picric acid
(b) barbituric acid
(c) ascorbic acid
(d) aspirin
4. Carboxylic acid group does not give the usual addition and elimination
reactions of aldehydes and ketones because
(a) O–H bond is more polar than  = O group
(b) carboxylate ion gets ionised
(c) carboxylate ion gets stabilised by resonance
(d) it exists as – COOH and there is no carbonyl group
5. Phenylmethyl ketone can be converted into ethylbenzene in one step by
which of the following reagents?
(a) LiAlH
4
(b) Zn-Hg/HCl 
(c) NaBH
4
(d) CH
3
MgI
6. In a set of the given  reactions, acetic acid yielded a product C.
Page 3


PART-I (Single Correct MCQs)
1. Which alkene on ozonolysis gives CH
3
CH
2
CHO and 
?
(a)
(b) CH
3
CH
2
CH = CHCH
2
CH
3
(c) CH
3
CH
2
CH = CH CH
3
(d)
2. Predict the product in the given reaction.
(a) 
(b)
(c)
(d)
3. The carboxyl functional group (– COOH) is present in
(a) picric acid
(b) barbituric acid
(c) ascorbic acid
(d) aspirin
4. Carboxylic acid group does not give the usual addition and elimination
reactions of aldehydes and ketones because
(a) O–H bond is more polar than  = O group
(b) carboxylate ion gets ionised
(c) carboxylate ion gets stabilised by resonance
(d) it exists as – COOH and there is no carbonyl group
5. Phenylmethyl ketone can be converted into ethylbenzene in one step by
which of the following reagents?
(a) LiAlH
4
(b) Zn-Hg/HCl 
(c) NaBH
4
(d) CH
3
MgI
6. In a set of the given  reactions, acetic acid yielded a product C.
List I List-II
(A) Benzaldehyde (i) Phenolphthalein
(B) Phthalic anhydride (ii) Benzoin condensation
(C) Phenyl benzoate (iii) Oil of wintergreen
(D) Methyl salicylate (iv) Fries rearrangement
Product C would be -
(a)
(b)
(c)
(d)
7. An organic compound ‘A’ on treatment with NH
3 
gives ‘B’ which on
heating gives ‘C’, ‘C’ when treated with Br
2
 in the presence of KOH
produces ethylamine. Compound ‘A’ is:
(a) CH
3
COOH
(b) CH
3
 CH
2 
CH
2 
COOH
(c)
(d) CH
3
CH
2
COOH
8. Match the compounds given in List-I with List-II and select the suitable
option given below :
(A) (B)
(C) (D)
(a) (iv) (i) (iii) (ii)
(b) (iv) (ii)
(iii) (i)
(c) (ii) (iii)
Page 4


PART-I (Single Correct MCQs)
1. Which alkene on ozonolysis gives CH
3
CH
2
CHO and 
?
(a)
(b) CH
3
CH
2
CH = CHCH
2
CH
3
(c) CH
3
CH
2
CH = CH CH
3
(d)
2. Predict the product in the given reaction.
(a) 
(b)
(c)
(d)
3. The carboxyl functional group (– COOH) is present in
(a) picric acid
(b) barbituric acid
(c) ascorbic acid
(d) aspirin
4. Carboxylic acid group does not give the usual addition and elimination
reactions of aldehydes and ketones because
(a) O–H bond is more polar than  = O group
(b) carboxylate ion gets ionised
(c) carboxylate ion gets stabilised by resonance
(d) it exists as – COOH and there is no carbonyl group
5. Phenylmethyl ketone can be converted into ethylbenzene in one step by
which of the following reagents?
(a) LiAlH
4
(b) Zn-Hg/HCl 
(c) NaBH
4
(d) CH
3
MgI
6. In a set of the given  reactions, acetic acid yielded a product C.
List I List-II
(A) Benzaldehyde (i) Phenolphthalein
(B) Phthalic anhydride (ii) Benzoin condensation
(C) Phenyl benzoate (iii) Oil of wintergreen
(D) Methyl salicylate (iv) Fries rearrangement
Product C would be -
(a)
(b)
(c)
(d)
7. An organic compound ‘A’ on treatment with NH
3 
gives ‘B’ which on
heating gives ‘C’, ‘C’ when treated with Br
2
 in the presence of KOH
produces ethylamine. Compound ‘A’ is:
(a) CH
3
COOH
(b) CH
3
 CH
2 
CH
2 
COOH
(c)
(d) CH
3
CH
2
COOH
8. Match the compounds given in List-I with List-II and select the suitable
option given below :
(A) (B)
(C) (D)
(a) (iv) (i) (iii) (ii)
(b) (iv) (ii)
(iii) (i)
(c) (ii) (iii)
(iv) (i)
(d) (ii) (i)
(iv) (iii)
9. C
6
H
5
CH=CHCHO  C
6
H
5
CH=CHCH
2
OH
In the above sequence X can be :
(a) H
2
/Ni
(b) NaBH
4
(c) K
2
Cr
2
O
7
/H
+
(d) Both (a) and (b)
10. Acetaldehyde reacts with semicarbazide and forms semicarbazone. Its
structure is
(a) CH
3
CH = NNHCON = CHCH
3
(b) CH
3
CH = NNHCONH
2
(c)
(d) CH
3
CH = N—CONHNH
2
11. Benzoic acid may be converted to ethyl benzoate by reaction with
:
(a) Sodium ethoxide
(b) Ethyl chloride
(c) Dry HCl—C
2
H
5
OH
(d) Ethanol
12. The increasing order of the rate of HCN addition to compound A – D is 
                                           
(A) HCHO
(B) CH
3
COCH
3
(C) PhCOCH
3
(D) PhCOPh
(a) D < C < B < A
(b) C < D < B < A
(c) A < B < C < D
(d) D < B < C < A
Page 5


PART-I (Single Correct MCQs)
1. Which alkene on ozonolysis gives CH
3
CH
2
CHO and 
?
(a)
(b) CH
3
CH
2
CH = CHCH
2
CH
3
(c) CH
3
CH
2
CH = CH CH
3
(d)
2. Predict the product in the given reaction.
(a) 
(b)
(c)
(d)
3. The carboxyl functional group (– COOH) is present in
(a) picric acid
(b) barbituric acid
(c) ascorbic acid
(d) aspirin
4. Carboxylic acid group does not give the usual addition and elimination
reactions of aldehydes and ketones because
(a) O–H bond is more polar than  = O group
(b) carboxylate ion gets ionised
(c) carboxylate ion gets stabilised by resonance
(d) it exists as – COOH and there is no carbonyl group
5. Phenylmethyl ketone can be converted into ethylbenzene in one step by
which of the following reagents?
(a) LiAlH
4
(b) Zn-Hg/HCl 
(c) NaBH
4
(d) CH
3
MgI
6. In a set of the given  reactions, acetic acid yielded a product C.
List I List-II
(A) Benzaldehyde (i) Phenolphthalein
(B) Phthalic anhydride (ii) Benzoin condensation
(C) Phenyl benzoate (iii) Oil of wintergreen
(D) Methyl salicylate (iv) Fries rearrangement
Product C would be -
(a)
(b)
(c)
(d)
7. An organic compound ‘A’ on treatment with NH
3 
gives ‘B’ which on
heating gives ‘C’, ‘C’ when treated with Br
2
 in the presence of KOH
produces ethylamine. Compound ‘A’ is:
(a) CH
3
COOH
(b) CH
3
 CH
2 
CH
2 
COOH
(c)
(d) CH
3
CH
2
COOH
8. Match the compounds given in List-I with List-II and select the suitable
option given below :
(A) (B)
(C) (D)
(a) (iv) (i) (iii) (ii)
(b) (iv) (ii)
(iii) (i)
(c) (ii) (iii)
(iv) (i)
(d) (ii) (i)
(iv) (iii)
9. C
6
H
5
CH=CHCHO  C
6
H
5
CH=CHCH
2
OH
In the above sequence X can be :
(a) H
2
/Ni
(b) NaBH
4
(c) K
2
Cr
2
O
7
/H
+
(d) Both (a) and (b)
10. Acetaldehyde reacts with semicarbazide and forms semicarbazone. Its
structure is
(a) CH
3
CH = NNHCON = CHCH
3
(b) CH
3
CH = NNHCONH
2
(c)
(d) CH
3
CH = N—CONHNH
2
11. Benzoic acid may be converted to ethyl benzoate by reaction with
:
(a) Sodium ethoxide
(b) Ethyl chloride
(c) Dry HCl—C
2
H
5
OH
(d) Ethanol
12. The increasing order of the rate of HCN addition to compound A – D is 
                                           
(A) HCHO
(B) CH
3
COCH
3
(C) PhCOCH
3
(D) PhCOPh
(a) D < C < B < A
(b) C < D < B < A
(c) A < B < C < D
(d) D < B < C < A
13. 5 - Methyl -2 -hexanone can be synthesised from acetoacetic ester and
RX. Which of the following RX is used ?
(a)
(b)
(c)
(d)
14. The correct order of increasing acid strength of the
compounds
(A) CH
3
CO
2
H
(B) MeOCH
2
CO
2
H
(C) CF
3
CO
2
H
(D) is
(a) D < A < B < C
(b) A < D < B < C
(c) B < D < A < C
(d) D < A < C < B
15. Which of the following cannot reduce Fehling solution?
(a) Formic acid
(b) Acetic acid
(c) Formaldehyde
(d) Acetaldehyde
16. Pinacolone is
(a) 2, 3-Dimethyl-2, 3-butanediol
(b) 3,3-Dimethyl-2-butanone
(c) 1-Phenyl-2-propanone
(d) 1, 1-Diphenyl-1, 2-ethandiol
17. Conversion of acetaldehyde into ethyl acetate in presence of aluminium
ethoxide is called
(a) Aldol condensation
(b) Cope reaction
(c) Tischenko reaction