Tag: measurement of density

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

The SI unit of density is __________.

  1. $ \displaystyle kg/m^{3} $
  2. $ \displaystyle kg/m^{2} $
  3. $ \displaystyle kg^{3} $
  4. $ \displaystyle m^{3} $
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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 } $.

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

Which of the following statements are true for density?

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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).

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

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

  1. because they have different shapes

  2. because they have different densities

  3. because they have the same densities

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Density

  2. Mass

  3. Volume

  4. Current
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Define density.

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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 $1\ kgm^{-3}$.