Q18 Give reasons for the following

(1) All temperatures in the absolute (Kelvin) scale are in positive figures.
(2) Gases have a lower density compared to that of solids or liquids.
(3) Gases exert pressure in all directions.
(4) It is necessary to specify the pressure and temperature of gas while stating its volume.
(5) The inflating balloon seems to violate Boyle’s law.
(6) Mountaineers carry oxygen cylinders with them.
(7) Gas fills completely the vessel in which it is kept.

Solution

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