Question

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

• 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 1

Answer: (B)

Pure water and glass; glass and alcohol

Answer 2

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