Question

The volume of 100g of a substance is $20c{m}^3$. If the density of water is 1 $gc{m}^{-3}$, then the substance will sink in water.

• A. The substance will sink.
• B. The substance will float.

Answer 1

The correct option is A The substance will sink.

Since, mass of the substance = 100 g
Its volume = $20c{m}^3$
Density of the substance $=\frac{Mass}{Volume}=\frac{10g}{20c{m}^{-3}}=5gc{m}^{-3}$
Since, density of the substance is $5gc{m}^{-3}$ its relative density will be 5.
A substance with a relative density greater than 1, sinks in water.