Question

A blade can float on water because of _____ of water.

• A. heat capacity
• B. boiling point
• C. freezing point
• D. surface tension

Answer 1

The correct option is D

surface tension

The number of molecules in vapour form just above the surface the of water is less than those on the surface. Hence the attraction towards sides and the interior will be greater. Consequently, the liquid surface behaves like a stretched membrane. This behaviour causes surface tension. Due to surface tension, the blade floats on the water.