NCERT In-text Page 6 - Q3 - Matter in Our Surroundings
Question: 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.
Answer: (a) Negligible attraction forces allow free movement. (b) Gas particles collide with walls. (c) Table has definite shape and volume. (d) Air has large intermolecular spaces; wood has tightly packed...
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