MCQs of Aldehydes, Ketones and Carboxylic Acids

Aldehydes, Ketones and Carboxylic Acids MCQs

MCQs of Aldehydes, Ketones and Carboxylic Acids

Showing 81 to 90 out of 162 Questions

81.

With which of the following will acetone react ?

(a)	Tollen’s reagent
(b)	Fehling solution A + B
(c)	NH₂OH
(d)	All of the given

82.

When glucose is heated with Fehling solution A + B, red precipitate of Cu₂O is obtained. Hence glucose contains _____ group.

(a)	Ketone
(b)	alcohol
(c)	aldehyde
(d)	-COOH acid group

83.

Using which of the following reagents, can CH₃CHO be distinguished from CH₃COCH₃ ?

(a)	NaHSO₃
(b)	NH₂OH
(c)	C₆H₅NHNH₂
(d)	[Ag(NH₃)₂]OH

84.

Which of the following reaction will give primary alcohol ?

(a)	${CH}_{3} {COCH}_{3} \overset{Na + C_{2} H_{5} OH}{\to}$
(b)	${CH}_{3} CHO + {CH}_{3} MgI \overset{Hydrolysis}{\to}$
(c)	${CH}_{3} CHO \overset{Zn - Hg / HCl}{\to}$
(d)	None of the above

85.

Which of the following reactions gives methanol and formic acid from formaldehyde ?

(a)	Wolff - Kishner
(b)	Cannizzaro
(c)	Clemmensen
(d)	Hoffmann

86.

Ethanal + Benzaldehyde \to_{2 \cdot D & H_{2} O}^{1 \cdot dil . NaoH} X . Identify the product “ X ” .

(a)	3 - phenyl prop - 2 - enol
(b)	3 - phenyl prop - 2 - enal
(c)	3 - phenyl propanal
(d)	2 - phenyl prop - 2 -enal

87.

What is the name of the following reaction ? When an aldehyde, which does not have an α - hydrogen atom, is treated with concentrated NaOH (alkali) solution, self oxidation - reduction (disproportionation) occurs. One molecule of aldehyde is oxidized and the other molecule of aldehyde is reduced.

(a)	Aldol condensation reaction
(b)	Cross - aldol condensation reaction
(c)	Cannizzaro reaction
(d)	None of the above

88.

Which of the following statements is wrong when methanol is converted into methanoic acid ?

(a)	Oxidation number of C is increased by 2.
(b)	Hybridization changes form sp² to sp³
(c)	Reactant and product both give silver mirror test.
(d)	Mass of the product increases by 16 g.

89.

On reduction of which of the following will butan-2-ol formed ?

(a)	Butyraldehyde
(b)	Methyl ethyl ketone
(c)	Diethyl ether
(d)	None of the above

90.

Which of the following compounds will not give cannizzaro reaction ?

(a)	Formaldehyde
(b)	Benzaldehyde
(c)	Acetaldehyde
(d)	Trimethyl acetaldehyde

Showing 81 to 90 out of 162 Questions