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Q.

For which of the two pairs, the angle of contact is same

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a

Water and glass; glass and mercury

b

Pure water and glass; glass and alcohol

c

Silver and water; mercury and glass

d

Silver and chromium; water and chromium

answer is B.

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Detailed Solution

Both liquids water and alcohol have same nature (i.e. wet the solid). Hence angle of contact for both is acute.
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