Question

The volume of a $500\text{g}$ sealed packet is $350{\text{cm}}^3$. Will the packet float or sink in a saturated salt solution, if the density of the solution is $1.2{\text{g cm}}^{-3}$?

• A. The packet will sink
• B. The packet will float
• C. The packet will float submerged
• D. None of these

Answer 1

The correct option is A The packet will sink

Mass of packet $=500\text{g}$
Volume of packet $=350{\text{cm}}^3$
Density of packet $=\frac{\text{Mass}}{\text{Volume}}=\frac{500}{350}{\text{g/cm}}^3=1.43{\text{g/cm}}^3$
The sealed packet will sink in the salted water as its density is $1.43{\text{g/cm}}^3$, which is more than that of the salted water.