It is observed that H 2 and He gases always show positive deviation from ideal behaviour i.e., Z 1. This is because

Question

It is observed that H 2 and He gases always show positive deviation from ideal behaviour i.e., Z > 1. This is because, the value of 'a' is very large due to high attractive forces, the weak intermolecular forces of attraction due to which 'a' is very small and a V 2 is negligible, the value of 'b' is very large due to large size of the molecules, both 'a' and 'b' are very small and negligible

MARKS App · Accepted Answer

Due to weak intermolecular forces of attraction, H 2 and He gases show the value of Z > 1 and always show positive deviation at any pressure.

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