In Equation of state formula for perfect gas we have :
So we know perfect gas is a gas in which particles don't have any contact with each other. So logically there shouldn't be any pressure in this situation .
Sorry for poor English
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Pressure is due to the gas molecules contacting the container not each other
The particles of a gas do have contact with each other. But it is axiomatic, of an ideal gas, that any collisions between them are perfectly elastic. This implies there are negligible attractions between the particles and no energy is lost during a collision.