200 ml of O2 gas maintained at 700mm pressure and 250ml of N2 gas maintained at 720mm pressure are put together in one litre flask. If the temperature is kept constant, the final pressure of the mixture in mm is

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450

320

632

316

answer is B.

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Detailed Solution

P=P1V1+P2V2V1+V2(or)Vfinal =700(200)+720(250)1000 P=320 mm

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