Question

A block of iron sinks in fluid A but floats in another liquid B. Choose the correct option.

• A. Density of fluid A > Density of fluid B
• B. Density of fluid A = Density of fluid B
• C. Density of fluid A < Density of fluid B
• D. Density of fluid A $\ge$ Density of fluid B

Answer 1

The correct option is C Density of fluid A < Density of fluid B

The sinking and floating of a body in a liquid is due to the difference in their densities. If the density of the body is greater than the liquid then it sinks.
Hence, density of fluid A is less than the density of iron and density of iron is less than the density of fluid B.
So, density of fluid B must be greater than iron and thus also greater than fluid A.