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(a) What do you mean by ‘Surface Tension’ of a liquid? (b) Equal volumes of two gases A and B diffuse through a porous

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(a) What do you mean by ‘Surface Tension’ of a liquid? 

(b) Equal volumes of two gases A and B diffuse through a porous pot in 20 and 10 seconds respectively. If the molar mass of A be 80, find the molar mass of B.

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(a) Surface Tension of a liquid is the force by which surface molecules are attracted towards the bulk.

(b)

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