State whether the following statements are “True” or “False”. Change the false statements
by rewriting
a) Liquids expand more than gases on heating.
b) Gases cannot be compressed easily with a little pressure.
c) Solids have no definite shape.
d) Liquids have lower densities than Gases.
e) Solids have very low densities.
TNSCERT Class 9 General Science Ch3 Is Matter Around us Pure
Answers
Answer:
(a) False. Liquids expand less than gas on heating.
The molecules so present in liquid contain volume and shape of the liquid is totally dependent on the shape of the container, which means that the liquid has the only volume in it on the other hand gases have either shape or volume.
(b) False. Gases can be compressed easily. As I have talked above, that gases neither have volume nor do they have shape, so they move around freely. The molecules present in it are not stick to each other as they are in a solid.
(c) False. Solids do have a definite shape. These molecules are bind together which makes them form into a shape.
(d) False. Gases have lower densities than Liquid. The molecules so present in liquid contain volume and shape of the liquid is totally dependent on the shape of the container, which means that the liquid has the only volume in it on the other hand gases have neither shape nor volume.
(e) False. Gases have low densities in comparison with solid and liquid.