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Units of van der Waal's constants 'a' an...

Units of van der Waal's constants 'a' and 'b' are respectively

A

bar `L^(2) mol^(-2) and L mol^(-1)`

B

bar `L^(2) mol^(-1) and L^(-1) mol^(-1)`

C

bar `L^(2) mol^(2) and L^(-1) mol^(-1)`

D

`"bar"^(-1) L^(2) mol^(-2) and L^(-2) mol^(-1)`

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A
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