Question

The compound that will not give iodoform on treatment with alkali and iodine is :

A. acetone

B. ethanol

C. diethyl ketone

D. isopropyl alcohol

Answer : diethyl ketone

Solution :
TIPS/Formulae :
Iodoform test is given by compounds having $$ - COC{H_3}$$ group.
In acetone $$ - COC{H_3}$$ group is present. Further ethanol and isopropyl alcohol get oxidised to acetaldehyde and acetone respectively ( both having $$ - COC{H_3}$$ group ) in presence of $${I_2}$$ and they in turn give the test. Thus only diethyl ketone does not give this test.

Releted MCQ Question on
Organic Chemistry >> Aldehyde and Ketone

Releted Question 1

The reagent with which both acetaldehyde and acetone react easily is

A. Fehling’s reagent

B. Grignard reagent

C. Schiff’s reagent

D. Tollen’s reagent

Releted Question 2

The Cannizzaro reaction is not given by

A. trimethylacetaldehye

B. acetaldehyde

C. benzaldehyde

D. formaldehyde

Releted Question 3

The compound that will not give iodoform on treatment with alkali and iodine is :

A. acetone

B. ethanol

C. diethyl ketone

D. isopropyl alcohol

Releted Question 4

Polarisation of electrons in acrolein may be written as

A. $$\mathop {C{H_2}}\limits^{{\delta ^ - }} = CH - \mathop {CH}\limits^{{\delta ^ + }} = O$$

B. $$\mathop {C{H_2}}\limits^{{\delta ^ - }} = CH - CH = \mathop O\limits^{{\delta ^ + }} $$

C. $$\mathop {C{H_2}}\limits^{{\delta ^ - }} = \mathop {CH}\limits^{{\delta ^ + }} - CH = O$$

D. $$\mathop {C{H_2}}\limits^{{\delta ^ + }} = CH - CH = \mathop O\limits^{{\delta ^ - }} $$

Practice More Releted MCQ Question on
Aldehyde and Ketone

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