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Question:

The volume of 50 g of a substance is 20 cm³. If the density of water is 1 g cm⁻³. Find the density of the substance and interpret whether the substance will sink or float?

1.5 g/cm3, Substance will float inside water

2.5 g/cm3, Substance will sink

2.5 g/cm3, Substance will float

1.5 g/cm3, Substance will neither sink nor float

Solution:

The correct option is C
2.5 g/cm³, Substance will sink
Given : Density of water ρ=1g/cm³
Density of the substance ρ′=Mass/Volume
ρ′=50/20=2.5g/cm³
As the density of the substance is greater than that of water, thus it will sink.