Question

State whether the following statements are True or False. If false give the correct statement
a. Air is not compressible.
b. Liquids have no fixed volume but have fixed shape.
c. Particles in solids are free to move.
d. When pulses are washed with water before cooking, the water is separated from them by the process of filtration
e. Strainer is a kind of sieve which is used to separate a liquid from solid
f. Grain and husk can be separated by winnowing
g. Air is a pure substance
h. Butter from curds is separated by sedimentation.

Answer 1

a) Air is compressible as the molecules can be made more dense or compacted.

b) Liquid takes the shape of the container keeping the volume fixed.

c) Particles in solids can vibrate and not free to move.

d) Filtration separates pulses from the water.

e) Having pores, strainers act as sieves to separate liquid from solid.

F) False, as air is not composed of single types of molecules.

g) Centrifugation separates butter from curd. 

Answer 2

a. Air is not compressible.
False

b. Liquids have no fixed volume but have fixed shape.
False

c. Particles in solids are free to move.
True

d. When pulses are washed with water before cooking, the water is separated from them by the process of filtration.
False

e. Strainer is a kind of sieve which is used to separate a liquid from solid.
False

f. Grain and husk can be separated by winnowing.
False

g. Air is a pure substance.
False

h. Butter from curds is separated by sedimentation.
False