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The highest pressure gas of a mixture has partial pressure p, the partial pressure of other gases decreases by factor of 2^(n-1), the partial pressure of second gases decreases by a factor of 2, partial pressure of third gas increases by 4, and so on, if the total pressure of gas mixture is 31p/16, how many gases are present in the mixture?
Options:
A .  3
B .  5
C .  10
D .  15
Answer: Option B
Answer: (b).5

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