Relative Density

Q.

The unit of the relative density of a substance is $kg/m^3$.

1. True

2. False

Q.

During the Gulf War, Iraqi forces intentionally released large quantities of oil into the Persian Gulf. What might have been the implications?

1. Oil formed the top layer of ocean water

2. Oxygen supply to marine organisms was cut off

3. Oil settled down at lower levels with passage of time

4. Oil mixed with ocean water after a long time and is now inseparable

Q. The weight of a solid is $80\text{g}$ in air and $50\text{g}$ in a liquid of relative density $1.5$. Calculate the relative density of the solid.

1. $4$
2. $6$
3. $8$
4. $2$

Q. A block of iron sinks in fluid $A$ but floats in another fluid $B$. So, what can we conclude?

1. Density of fluid $A$ > Density of fluid $B$
2. Density of fluid $A$ < Density of fluid $B$
3. Density of fluid $A$ = Density of fluid $B$ = $0$
4. Density of fluid $A$ = Density of fluid $B$ $\ne 0$

Q. The density of a substance is $0.5gc{m}^{-3}$. The substance _______.

1. floats in water
2. remains at original position
3. oscillates
4. sinks in water

Q. What is the SI unit of relative density?

1. kilogram per metre cube
2. metre cube per gram
3. kilogram
4. No unit

Q. Which of the following liquids is used as a standard to measure relative density?

1. Gasoline
2. Water
3. Liquid nitrogen
4. Alcohol

Q.

The ratio of the density of a substance to the density of water at 4°C is usually referred as:

1. Weight due to gravity

2. Acceleration due to gravity

3. Specific gravity

4. All of these

Q. The ratio of a body's mass to its volume is called its ______.

1. relative density
2. acceleration due to gravity
3. density
4. weight

Q. An egg just sinks when it is dropped in a container filled with water. If common salt is added to the water, then what will happen to the egg?

1. The egg stays as it is
2. The volume of the liquid decreases
3. The egg floats up
4. Cannot be determined