Q.

Mercury does not wet glass, wood or iron because

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a

Cohesive force is less than adhesive force

b

Cohesive force is greater than adhesive force

c

Angle of contact is less than 90o

d

Cohesive force is equal to adhesive force

answer is B.

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Detailed Solution

The glass rod is not wet when dipped in mercury because; the cohesive force of mercury molecules is more than the adhesive force between glass and mercury molecules

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Mercury does not wet glass, wood or iron because