RRB Group-D Model Paper 18 with answers for online practice

Question : 6 of 100

Marks: +1, -0

On dropping a water drop on surface of oil it will:

Cohesive force	Adhesive force
The force of attraction between molecules of the same substance is called the force of cohesion. This force is lesser in liquids and least in gases.	The force of attraction between the molecules of the different substances is called the force of adhesion.
Real-life example: It is difficult to break a drop of mercury into small droplets because of the large cohesive force between the mercury molecules.	Real-life example: Adhesive force enables us to write on the blackboard with a chalk.

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