Aldehydes, Ketones and Carboxylic Acids  MCQs

MCQs of Aldehydes, Ketones and Carboxylic Acids

Showing 71 to 80 out of 162 Questions
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71.
What is produced when acetophenone reacts with Zn/Hg + Conc. HCL ?
(a) Benzoic acid
(b) Salicylaldehyde
(c) Ethyl benzene
(d) 1 - phenyl - 1 - ethanol
Answer:

Option (c)

72.
In Wolff Kishner reaction, aldehyde and ketone are converted into _____ .
(a) hydrocarbon
(b) alcohol
(c) carboxylic acid
(d) ester
Answer:

Option (a)

73.
Which of the following reagents can bring about reduction of ketone ?
(a) H2 / Ni or LiAIH4
(b) Na + C2H5OH
(c) N2H4 /OH- or Zn - Hg / HCL
(d) All of the above
Answer:

Option (d)

74.
What is the red precipitate obtained in Fehling test of aldehyde ?
(a) Cu(OH)2
(b) CuO
(c) Cu2O
(d) CuSO4
Answer:

Option (c)

75.
The positive ion present in Tollen’s reagent is _____ .
(a) NH4+
(b) Ag+
(c) [Ag(NH3)2]+
(d) All of these
Answer:

Option (c)

76.
What can be used to purify aldehydes and ketones ?
(a) HCN
(b) CH3MgI
(c) NaOH
(d) NaHSO3
Answer:

Option (d)

77.
Which alcohol is obtained when ethanol is reacted with C2H5MgI and the intermediate product obtained is hydrolysed ?
(a) Propan - 1 - ol
(b) tertiary butyl alcohol
(c) Butan - 2 - ol
(d) Butan - 1 - ol
Answer:

Option (c)

78.
What is X in the following reaction ? Benzaldehyde + CH3MgI →Intermediate product →Hydrolysis X.
(a) Benzyl alcohol
(b) 1 - phenyl - 1 - ethanol
(c) Acetophenone
(d) None of the above
Answer:

Option (b)

79.
When benzaldehyde is reduced with _____, phenyl methanol can be prepared.
(a) CH3Br and Na
(b) CH3I and Mg
(c) CH3Br
(d) Zn and HCl
Answer:

Option (d)

80.
What is X in the following reaction ? X + HCN →Y  →aq.H2SO4Hydrolysis  2-hydroxyl-2-methyl propanoic acid
(a) Formaldehyde
(b) Acetaldehyde
(c) Propanal
(d) Acetone
Answer:

Option (d)

Showing 71 to 80 out of 162 Questions
5 6 7 8 9 10