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# The sum and difference of coefficient of real & apparent expansions of a liquid are in the ratio 2:1. The ratio of coefficient of real and apparent expansions must be

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a
1:1
b
2:3
c
3:1
d
6:5
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detailed solution

Correct option is C

γR+γaγR−γa=21 γRis coefficient of real expansion and γa is coefficient of apparent expansion γR+γa=2γr−2γa 3γa=γR ∴γRγa=31=ratio of coefficient of real and apparent expansions

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