Tag: fundamental and derived units

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Questions Related to fundamental and derived units

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

The density of milk is 1.04 $ \displaystyle g/cm^{3} $ Therefore $ \displaystyle 1cm^{3} $ of milk has a mass of ______ g.

  1. $1.04$
  2. $2.08$
  3. $3.12$
  4. $4.16$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Given,    density = $1.04gm/{ cm }^{ 3 }$

              Volume = $1{ cm }^{ 3 }.$

 Mass of milk $= density \times  Volume$

                            = $1.04\dfrac { gm }{ { cm }^{ 3 } } \times { 1cm }^{ 3 }$

So, the mass of milk $= 1.04gm$

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

One kilogram of sugar has more volume than one kilogram of iron. True or false.

  1. True

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

Since we know that density of iron is more than density of sugar hence 

$\rho _{iron} > \rho _{sugar}$

$\dfrac { mass\quad of\quad iron }{ volume\quad of\quad iron } >\dfrac { mass\quad of\quad sugar }{ volume\quad of\quad sugar } $

if mass of iron = mass of sugar

then,  $\dfrac { 1 }{ Volume\quad of\quad iron } >\dfrac { 1 }{ Volume\quad of\quad sugar } $

So, Volume of sugar > Volume of iron.

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.