Q.

At the same temperature, HCl gas and NH3 gas are present in two vessels of same volume at a pressure of P atmospheres each.  When one is jar  inverted over the other so that the two will mix, after some time the pressure in the vessels will become.

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a

P

b

p2

c

Zero

d

p4

answer is C.

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Detailed Solution

NH3 and HCl are reacting gases.  They can form solid NH4cl so pressure is zero. The chemical reaction is NH3g+HClgNH4Cls

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