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At room temperature, ammonia gas at 1 at...

At room temperature, ammonia gas at `1 atm` pressure and hydrogen chloride gas at `P atm` pressure are allowed to effuse through identical pin holes from opposite ends of a glass tube of `1 m` length and of uniform cross- section. Ammonium chloride is first formed at a distance of `60 cm` from the end through which `HCl` gas is sent in. What is the value of `P`?

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The correct Answer is:
`2.20atm`
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