Page 5 - HA

a) Unstable
b) Heterogeneous
c) Opaque
d) All of the above are correct

Q5 The path of sun light is visible through the canopy of a dense forest as: 1

a) The sunlight is scattered by the dust particles present in the air.
b) The sunlight is scattered by air particles
c) The sunlight is scattered by the water particles present in the air.
d) None of the above

Q6 Tyndall effect is observed due to the dispersion of light rays by the 1
particles of a medium. (True/False)

Concept: Separation techniques introduction, Evaporation, centrifugation

Q1. Assertion: copper sulphate can be separated from a solution of it by 1
evaporation.
Reason: Copper sulphate is a nonvolatile soluble solid.
Q2 Assertion: Centrifugation is based on centrifugal force. 1
Reason: Centrifugal force is always directed outwards.
Q3 Assertion: The different components of blood can be separated by 1
centrifugation.
Reason: Blood is a colloid
Q4 The dyes from ink can be separated by 1

a) Separating funnel
b) Evaporation
c) Chromatography
d) Sublimation

Q5 The colloids can be separated by 1

a) Sublimation
b) Evaporation
c) Chromatography
d) Centrifugation

Q6 The salt is obtained from sea water by__________________ 1

Concept: Separating funnel, sublimation, chromatography

Q1. Assertion: Ammonium chloride can be separated from a mixture of 1
sugar and ammonium chloride by sublimation.
Reason: Sugar is a sublimable solid
Q2 Assertion: The different components of chlorophyll can be separated 1
by chromatography.