brodidit for students
Home / Practice / Class 11 / Chemistry / Liquids
Liquids
8 Class 11 Chemistry questions with answers and explanations.
Printable worksheet with answer key
-
Boiling point of a liquid is the temperature at which its vapour pressure equals the:
- 1 Osmotic pressure
- 2 Atmospheric pressure
- 3 Zero
- 4 Critical pressure
Show answer
Correct answer: Atmospheric pressure
A liquid boils when its vapour pressure equals the external pressure.
-
Hydrogen bonding is strongest in:
- 1 HCl
- 2 H2S
- 3 CH4
- 4 H2O
Show answer
Correct answer: H2O
Water has O-H bonds that form strong hydrogen bonds.
-
Surface tension tends to:
- 1 Minimise the surface area
- 2 Increase the surface area
- 3 Increase temperature
- 4 Remove cohesion
Show answer
Correct answer: Minimise the surface area
It pulls a liquid surface to the smallest area, giving droplets their round shape.
-
The viscosity of a liquid decreases when it is:
- 1 Heated
- 2 Compressed
- 3 Cooled
- 4 Frozen
-
London dispersion forces are present in:
- 1 All molecules
- 2 Only polar molecules
- 3 Only ions
- 4 Only metals
Show answer
Correct answer: All molecules
Dispersion forces exist between all molecules and atoms.
-
A liquid with weak intermolecular forces has a:
- 1 High surface tension
- 2 Low boiling point
- 3 High viscosity
- 4 High boiling point
Show answer
Correct answer: Low boiling point
Little energy is needed to separate the molecules.
-
Capillary action is due to:
- 1 Magnetism
- 2 Adhesion and cohesion
- 3 Gravity only
- 4 Heat
-
The process in which a liquid changes to vapour only at its surface is:
- 1 Condensation
- 2 Boiling
- 3 Sublimation
- 4 Evaporation
Show answer
Correct answer: Evaporation
Evaporation occurs at the surface at any temperature.