Question

•The intermolecular forces are maximum in case of -

i) Copper
ii) Water

iii) Glycerin

iv) Hydrogen


• Potable water is obtained from river water by the process of

i) Sedimentation only

ii) Sedimentation and filtration only

iii) Sedimentation, filtration and chlorination only

iv) None of these

•Rusting of iron takes place due to the presence of ----------- in air.

i) Oxygen

ii) Nitrogen

iii) Water vapour

iv) Oxygen and water vapour


•The top part of a tooth projecting above the gums.

i) Root

ii) Neck

iii) Crown

iv) None of these


• The swim bladder present in fishes helps in -

i) Maintaining buoyancy

ii) Changing direction

iii) Swimming

iv) For breathing​

Answer 1

Answer:

1) copper

2) option 3

3) option 4

4) crown

5) option 4

Answer 2

Answer:

• Intermolecular forces of attraction are maximum in solids and minimum in gases, as solids have definite shape, and particles are closely packed.