MHT CET Physics question

Which one of following statements about the angle of contact (), is wrong? [MHT-CET 2023]

(A) for pure water - glass pair
(B) is not constant for particular solid - liquid pairCorrect
(C) for kerosene - glass pair
(D) for mercury - glass pair

Answer: (B)

Solution

For a given solid-liquid-gas combination the angle of contact has a definite constant value, so (b) is wrong; kerosene wets glass () and mercury does not

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Question ID VK-062181