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Which of the following exists as a gas at 287K?(a) Formaldehyde(b) Acetaldehyde(c) Propanal(d) AcetoneI 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

Answer»

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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