Question

Q. Write the chemical formula of simplest ketone and simplest aldehyde . Write two physical properties and two uses of ethanol.

Answer 1

↵Chemical formula of simplest ketone is propanone. Its structure is CH₃COCH₃ .
Chemical formula of simplest aldehyde is methanal. Its structure is HCHO.

Physical properties of ethanol :
1) Ethanol is a colourless liquid having a pleasant smell and a burning taste.
2) It is a volatile liquid having a low boiling point of 78^o C (351 K)
3) It is miscible with water in all proportions.

Uses of Ethanol

Ethanol is used :

• in the manufacture of ethanal, (i.e. acetaldehyde), and ethanoic acid, (i.e. acetic acid),
• as the fluid in thermometers,
• in preserving biological specimens.
• in the manufacture of paints, varnishes, lacquers and medicines
• in the preparation of organic compounds .