Question

liquid A has higher vapour pressure than liquid B. which liquid out of A and B will have lower boiling point?

Answer 1

Answer:

The answer is liquid A. Higher the vapor pressure lower will be the boiling point.

Explanation

When a liquid is heated the kinetic energy of its molecules increases and the collision between them increases. Due to increase in temperature the molecules collide and move apart from each other and their inter molecular decreases.

Thus the energy of molecules overcome the inter molecular forces and they free themselves from each other. Molecules with high kinetic energy escape from the surface in the form of vapors and the vapor pressure increases on the surface of the liquid.

This all happens in the liquid with lower boiling point because in high boiling point liquid the inter molecular forces are strong and high temperature is required to achieve the boiling point.  

Answer 2

Answer:

Vapour pressure of a liquid is directly proportional to boiling Point so at higher vapour pressure boiling point of a liquid will be greater. ...

So A have greater boiling point

Hope it helps you. .

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