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Which of the following exists as a gas at 287K?

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in Chemistry – Class 12 by (188k points)
Which of the following exists as a gas at 287K?

(a) Formaldehyde

(b) Acetaldehyde

(c) Propanal

(d) Acetone

I had been asked this question in an interview.

This question is from Aldehydes and Ketones Physical Properties in portion Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

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Right choice is (a) Formaldehyde

The explanation: Methanal exists as foul-smelling gas at room temperature. Ethanal is a volatile liquid which boils at 294K. Other aldehydes and ketones exist as either liquids or solids at room temperature.

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