Tag: substances in the surroundings - their states and properties

Questions Related to substances in the surroundings - their states and properties

Weight per unit volume of a substance is called its density. State whether true or false.

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:

Density = $\dfrac{mass}{volume}$  so $\rho$ = $\dfrac{m}{v}$  not $\dfrac{mg}{v}$ as weight = mg


so given statement is false 


hence option (B) is correct

The SI unit of density is __________.

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

  1. $ \displaystyle kg/m^{3} $

  2. $ \displaystyle kg/m^{2} $

  3. $ \displaystyle kg^{3} $

  4. $ \displaystyle m^{3} $

Show answer
Correct Option: A
Explanation:

Density of substance is mass per unit volume hence its unit are $kg/{ m }^{ 3 }$ in S/units & $gm/{ cm }^{ 3 }$ in CGS.

Mass per unit volume of a substance is called its density. True or false.

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: A
Explanation:

Density of substance is a characterstic property of a substance defined as mass of substance per unit volume.

density = $\dfrac { mass\quad of\quad substance }{ volume\quad of\quad substance } $.

State whether true or false.
Equal masses of iron and common salt have different volume.

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: A
Explanation:

Since density of a substance is characterstic property of a material hence for different substance of equal mass they will have different volumes.

Which of the following statements are true for density?

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

  1. It is a physical property of matter

  2. It is a scalar quantity

  3. It is the mass per unit volume of a substance

  4. All of the above

Show answer
Correct Option: D
Explanation:

Density is a physical property of a substance and is defined as the mass per unit volume of a substance. The density of a body is the amount of mass contained per unit volume of the body.

Since it does not have any direction it is a scalar quantity.

Multiplying relative density by 100 we get density of liquid in   $ \displaystyle kg/m^{3} $

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:

Relative density of a substance is ratio of density of substance to that of water. Hence density of substance can be found by multiplying relative density with 1000$kg/{ m }^{ 3 }$ (density of water).

State whether true or false.
The density of a substance is defined as the mass per unit volume of that substance.

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: A
Explanation:

The density of a substance is defined as the mass per unit volume of that substance.

Give reasons as to why equal masses of different substances have different volumes.

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

  1. because they have different shapes

  2. because they have different densities

  3. because they have the same densities

  4. none of these

Show answer
Correct Option: B
Explanation:

The mass of the substance is dependent on the density and volume of the substance. The substance having the same volume might have different mass because they have different densities.


Option $B$ is correct. 

Which of the following is a fundamental property of a substance?

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

  1. Density

  2. Mass

  3. Volume

  4. Current

Show answer
Correct Option: B
Explanation:

The fundamental property of a substance is the property which depends on the body and does not change due to any physical factor. Mass is a fundamental property of a substance. Another such property is the charge.

Define density.

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

  1. Density of a substance is defined as the weight per unit volume of that substance.

  2. Density of a substance is defined as the mass per unit volume of that substance.

  3. Density of a substance is defined as the volume per unit mass of that substance.

  4. Density of a substance is defined as mass times volume of the substance.

Show answer
Correct Option: B
Explanation:

Density of a substance is defined as the mass per unit volume. Its SI unit is $kgm^{-3}$. For example, the density of water at room temperature and atmospheric pressure is $1\ kgm^{-3}$.