Relative Density

Q. Why ships float in water?

Q. What is relative density?

Q.

Differentiate between the determination of density of regular solids and determination of density of irregular solids?

Q.

Instrument used for measuring the density or relative density of liquids is known as

Q. What is difference between equivalent weight and molecular mass

Q.

Write the formula for the relative density of a substance.

Q.

Kerosene floats on water because

1. Kerosene has more density

2. Kerosene has less density

3. Densities of water and kerosene are equal

4. Water has more density

Q.

The density of zinc is 5.1 g/cm ³. Find the mass of the zinc in volume 86 cm ³?

Q.

The relative density of mercury is 13.6. What does this statement mean ?

Q.

Relative Density of silver is 10.5. The density of silver in SI unit is

1. 105 Kg $m^{-3}$

2. 1050 Kg $m^{-3}$

3. 10500 Kg $m^{-3}$

4. 10.5 Kg $m^{-3}$

Q.

State some of the practical applications of relative density.

Q.

How the relative density of a solid determined by using Archimedes principle.

Q. The SI unit of relative density is

1. $kg/c{m}^3$
2. $kg/c{m}^3$
3. $g/c{m}^3$
4. No unit

Q.

An iceberg, having a volume of 2060 $0.92\frac{g}{c{m}^3}$, floats in sea water (density = 1.03$\frac{g}{c{m}^3}$ ) with a portion of 224 $c{m}^3$ above the surface. Calculate the density of ice.

Q.

An iron nail sinks in water but it floats in mercury. Why?

Q.

An empty density bottle weighs 22 g. When completely filled with water it weighs 50 g and when completely filled with brine solution it weighs 54 g. Calculate the density of the brine solution.

1. 1.14

2. 2.28

3. 1.14 g/cm³

4. 2.28 g/cm³

Q.

The relative density of silver is 10.8. The density of water is $1000\frac{kg}{m^3}$. The density of silver is:

1. 10.8 10 kg/m³

2. None of these

3. 10.8 kg/m³

4. 10.8 ​ kg/m³

Q.

A piece of pure gold (density = 19.3 gcm^-3 ) is suspected to be hollow from inside. It weighs 77.2 g in air and 71.2 g in water. The volume of the hollow portion in gold will be

1. 2 cm³

2. 3 cm³

3. 4 cm³

4. 1 cm³

Q.

What is the density of water in SI units?

Q.

When a solid body is fully immersed in a liquid, the volume of the displaced liquid is:

1. Greater then the volume of the sold body

2. Less then the volume of the solid body

3. Depending upon the manner in which the body is being immersed in the liquid

4. Equal to the volume of the solid body

Q.

A body of volume 50 centimetre cube is completely immersed in water. Find the force of buoyancy on it.

Q.

The mass of lead is 232 g and its volume is 20 cm ³. Find the density of lead in kg m ^-3

Q.

The device used to measure Relative Density is called

1. Hygrometer

2. Hydrometer

3. Lactometer

4. Thermometer

Q.

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

1. Weight due to gravity

2. Acceleration due to gravity

3. Specific gravity

4. Relative density

Q. Why a iron nail sink in water but ship float

Q.

Make a lactometer with a ballpoint refill. What would you do to make the refill stand vertically straight?

Q.

State Archimedes principle and describe an experiment to verify it.

Q.

What do we call, 'mass of a body per unit volume'?

1. Density

2. Relative density

3. Speed

4. Pressure

Q.

What is the value of relative density of water ?

Q. Mass of stone=10 kg
relative density=4
Find the work done in lifting the stone through a height of 20m inside the lake