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For one mole of a van der Waals gas when...

For one mole of a van der Waals gas when `b =0` and `T =30 K` the `PV vs1//V` plot is shown below The value of the van Waals constant a `("atm litre"^(2) mol^(-2))` is
.

A

`1.0`

B

4.5

C

1.5

D

`3.0`

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The correct Answer is:
C
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