Tag: measurement of density

Questions Related to measurement of density

Which one of the following conditions will cause the density of a liquid to decrease?

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. Adding more of the liquid to the container

  2. Cooling the liquid

  3. Heating the liquid

  4. Dividing the liquid into two equal volumes

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Correct Option: C
Explanation:

$Answer: C$

The density of a liquid or any substance is the material property. The density of the liquid cannot be changed by decreasing the amount of liquid. The density can be effected only by heating the liquid which leads to the change in the molecular distance and leads to a change in density.

Find the odd one out

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. density

  2. pressure

  3. mass

  4. volume

Show answer
Correct Option: B
Explanation:

Density, mass, volume are the characterstic property of a substance whereas Pressure is an extensive property which depends on area of application of force.

Density of a material varies with temperature.
chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. True

  2. False

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Correct Option: A
Explanation:

Density of the material is defined as mass per unit volume. Since, volume is temperature dependent, increasing the temperature of the material (with few exceptions) decreases the density of material by increasing its volume. 

Hence, given statement is true.

Density of a substance is defined as

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. Density = Mass x Volume

  2. Density = Mass /Volume

  3. Density = Volume Mass

  4. None

Show answer
Correct Option: B
Explanation:

Density of the substance is defined as the ratio of mass of substance to its volume.

$\therefore$  Density of substance     $\rho = \dfrac{M}{V}$.

The density of silver is 13.6 times greater than that of water.
chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

We know that, density of silver is $10.5 \times 10^3 \dfrac{kg}{m^3}$ and density of water is $1.00 \times 10^3 \dfrac{kg}{m^3}$.


Therefore, the density of silver is $10.5$ times greater than that of water.

Hence, the given statement is false.

From below substances which is more dense?

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. Water

  2. Clay

  3. Wax

  4. none

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Correct Option: B
Explanation:
The density of the following substances is:
Wax approximately has a density around $900kg/m^3$
The density of water is $1000kg/m^3$
Density of clay is $1330kg/m^3$

The density of the clay is the maximum of all the three.

Which of the following is true about the density of a substance?

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. It is a derived quantity.

  2. The unit of density in SI system is kilogram per metre$^3$.

  3. The density of a substance can be measured if the mass of the substance for a certain volume is known.

  4. Density is a vector quantity

Show answer
Correct Option: A,B,C
Explanation:

Let the mass of the substance be $m$ and its volume be $V$. Then the density of the substance is defined as the ratio of mass to the volume of the body.

Thus the density of a substance can be derived as  $\rho = \dfrac{m}{V}$

SI unit of mass is $kg$ and that of the volume is $m^3$. Thus SI unit of density is  $kg/m^3$.
The density of a substance is a scalar quantity, not a vector quantity as it has magnitude only.
Hence options A, B and C are correct.

SI unit of density is ________ times its CGS unit.

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. 1000

  2. 10

  3. 0.1

  4. 0.001

Show answer
Correct Option: D
Explanation:

SI unit of density $=\dfrac { kg }{ { m }^{ 3 } } =\dfrac { 1000 }{ 10^6 } \dfrac { g }{ cc } $

                             $\dfrac { 1kg }{ { m }^{ 3 } } ={ 10 }^{ -3 }9/cc$

Which of the following is true about the density of a substance?

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. It is a derived quantity.

  2. The unit of density in SI system is kilogram per metre$^3$.

  3. The density of a substance can be measured if the mass of the substance for a certain volume is known.

  4. Density is a vector quantity.

Show answer
Correct Option: A,B,C
Explanation:

The density of a substance is defined as the mass of the substance per unit volume of the substance.
$\rho=\dfrac mV$

Its unit is $kg/m^3$

It is a derived quantity as it uses the unit of mass and the unit of length.
The unit of density in the SI system is kilogram per meter $^3$.
The density of a substance can be measured if the mass of the substance for a certain volume is known.

A vessel contains oil (density $= 0.8\ gm/cm^{3})$ over mercury (density $= 13.6\ gm/ cm^{3})$. A uniform sphere floats with half its volume immersed in mercury and the other half in oil. The density of the material of sphere in $gm/ cm^{3}$ is

chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

  1. $3.3$

  2. $6.4$

  3. $7.2$

  4. $12.8$

Show answer
Correct Option: C
Explanation:

A vessel contains oil density $=0.8gm/cm^3$

Mercury density $=13.6gm/cm^3$
Total weight is balanced by the displaced volumes of the two different fluids. Let it $s$ and volume id $v$ and te density is $n$.
Then the equilibrium condition should be
$v _{mg}=v/2(0.8)g+\cfrac{v}{2\times136g}\n=0.4+6.8=7.2gm/cm^3$