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    				| 1. | A gas is filled in a cylinder fitted with a piston at a definite temperature and pressure. Explain on the basis of kinetic theory why on pulling the piston out, the pressure of decreases. | 
| Answer» SOLUTION :When piston is pulled out the VOLUME of the gas increases, Now losses NUMBER of molecules colliding against the wall of container per UNIT area decreases. Hence pressure decreases. | |