Question

Consider the reactions,
Aldehyde and Ketone mcq question image
Identify $$A, X,Y$$  and $$Z$$

A. $$A$$ - methoxymethane, $$X$$ - ethanoic acid, $$Y$$ - acetate ion, $$Z$$ - hydrazine
B. $$A$$ - methoxymethane, $$X$$ - ethanol, $$Y$$ - ethanoic acid, $$Z$$ - semicarbazide
C. $$A$$ - ethanal, $$X$$ - Acetaldelyde, $$Y$$ - but - 2 - enal, $$Z$$ - semicarbazone  
D. $$A$$ - ethanol, $$X$$ - acetaldehyde, $$Y$$ - butanone, $$Z$$ - hydrazone
Answer :   $$A$$ - ethanal, $$X$$ - Acetaldelyde, $$Y$$ - but - 2 - enal, $$Z$$ - semicarbazone
Solution :
Aldehydes gives silver minor test so, $$'X’$$ may be alcohol which is oxidised by $$Cu$$  gives aldehydes.
Therefore,
A is acetaldehyde $$\left( {C{H_3}CHO} \right)$$
Aldehyde and Ketone mcq solution image

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

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Aldehyde and Ketone


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