Tag: properties of substances

Questions Related to properties of substances

Density of a body depends on its shape and size. 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 of a liquid is a characterstic property of a substance & it is independent of any other external factors like volume etc.

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

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

  1. $1.04$

  2. $2.08$

  3. $3.12$

  4. $4.16$

Show answer
Correct Option: A
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 $= 1.04gm$

One kilogram of sugar has more volume than one kilogram of iron. 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:

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.

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.