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n mole of He and 2n mole of O2 is mixed ...

n mole of He and 2n mole of `O_2` is mixed in a container. Then `(C_p/C_v)_(mix)` will be

A

`19/13`

B

`13/19`

C

`13/6`

D

`6/13`

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The correct Answer is:
A
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