Page No 6:
Question 2:
(a) Tabulate the differences in the characteristics of states of matter.
(b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy, and density.
Page No 6:
Question 3:
Give reasons:
(a) A gas fills completely the vessel in which it is kept.
(b) A gas exerts pressure on the walls of the container.
(c) A wooden table should be called a solid.
(d) We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.
Page No 9:
Question 3:
For any substance, why does the temperature remain constant during the change of state?
Page No 10:
Question 2:
How does water kept in an earthen pot (matka) become cool during summers?
Page No 10:
Question 3:
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
Page No 10:
Question 4:
Why are we able to sip hot tea or milk faster from a saucer than a cup?
Page No 12:
Question 7:
Why is ice at 273 K more effective in cooling than water at the same temperature?
