Aldehydes, Ketones and Carboxylic Acids MCQs | Question – Paper 2 5


Topic: Aldehydes, Ketones and Carboxylic Acids, Test No.: 02, Total MCQs: 15

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Question 1

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is: [CBSE AIPMT 2012]

A

B

C

D

Question 2
Clemmensen reduction of a ketone is carried out in the presence of which of the following? [CBSE AIPMT 2011]
A
H2 and Pt as catalyst
B

Glycol with KOH

C

Zn-Hg with HCl

D

LiAlH4

Question 3

Identify the product in the reaction

? [DELHI PMT 2010]

A

PhCH2CH2CHO

B

PhCOCH2CH3

C

PhCH2COCH3

D

PhCOCOMe

Question 4

Which of the following statements is not correct? [DELHI PMT 2010]

A
Aldehydes and ketones undergo nucleophilic addition
B
Aldehydes and ketones undergo electrophilic substitution
C
Aldehydes and ketones contain polar carbonyl group
D
Lower members of aldehydes and ketones are soluble in water due to hydrogen bonding
Question 5

Compound 'A' undergoes formation of cyanohydrins which on hydrolysis gives lactic acid (CH3CHOHCOOH). Therefore, compound 'A' is [DELHI PMT 2010]

A
formaldehyde
B
acetaldehyde
C
acetone
D
benzaldehyde
Question 6

Trichloroacetaldehyde, CCl3 CHO reacts with chlorobenzene in the presence of sulphuric acid and produces [CBSE AIPMT 2009]

A

B

C

D

Question 7

The compound which forms acetaldehyde when heated with dilute NaOH is [Karnataka CET 2009]

A
1 chloro ethane
B
1, 1 dichloro ethane
C
1, 2 dichloro ethane
D
1, 1, 1 trichloro ethane
Question 8

An organic compound X is oxidized by using acidified K2Cr2O7. The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The possible structure of X is [Karnataka CET 2009]

A

(CH3)2CHOH

B

CH3CHO

C

CH3CH2OH

D

Question 9

For making distinction between 2-pentanone and 3-pentanone the reagent to be employed is [WB JEE 2009]

A

K2Cr2O7/H2SO4

B

Zn-Hg/HCl

C

SeO2

D

Iodine/NaOH

Question 10

In which of the following reactions new carbon-carbon bond is not formed [WB JEE 2009]

A
Cannizzaro reaction
B
Wurth reaction
C
Aldol condensation
D
Friedel-Crafts reaction
Question 11

A strong base can abstract an a-hydrogen from [CBSE AIPMT 2008]

A
Amine
B
Alkane
C
Alkene
D
Ketone
Question 12

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called [CBSE AIPMT 2007]

A
Cope reduction
B
Dow reduction
C
Wolff-Kishner reduction
D
Clemmensen reduction
Question 13

The product formed in Aldol condensation is [CBSE AIPMT 2007]

A
a beta-hydroxy aldehyde or a beta-hydroxy ketone.
B
an alpha-hydroxy aldehyde or ketone.
C
an alpha, beta unsaturated ester
D
a beta-hydroxy acid
Question 14

The incorrect IUPAC name is [CBSE AIPMT 2001]

A

B

C

D

Question 15

The appropriate reagent for the transformation: [IIT JEE 2000]

A

Zn (Hg), HCl

B

NH2NH2, OH-

C

H2, Ni

D

NaBH4

 

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5 thoughts on “Aldehydes, Ketones and Carboxylic Acids MCQs | Question – Paper 2

  • Muskan Agarwal

    Hey!Can explain you question no. 15. Others i too dont know. In 15 there is a slight misprint actually its a ketone c=o there, which can be converted to alkane on treatment with NH2-NH2, KOH which is called wolff kischner reduction. You might have studies this under the prepartion of alkanes using carbonyl compounds. We arent using clemmensen(Zn-Hg, amalgam) here cuz then it will replace the OH with Cl. NaBH4 will convert ketone to alcohol. H2,Pt wont give this reaction, it also coverts ketone to alcohol. Hence the answer is option B. Hope it helped you. Cheers!! 😀

  • napyaninja

    Q.no 6 —-> thats formation of D.D.T from chlorobenzene+Ccl3CHo

  • Shreshthi

    Ketones do not undergo nucleophillic reactions due to steric and electronic reasons
    Hence the ans provided i wrong!