Tag: composition of matter

Questions Related to composition of matter

Suspensions transmit light. True or false?

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Suspensions are "murky" or "opaque". They do not transmit light. Suspensions separate on standing. The mixture of particles can be separated by filtration.

Why are suspensions not stable?

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. Particles are very small

  2. Particles settle at the bottom

  3. Particles do not settle

  4. Particles mix homogeneously

Show answer
Correct Option: B
Explanation:

When suspension is left for some time, particles get settled in bottom. Therefore, suspension is not stable.

Suspension shows Tyndall effect because of :

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. large size of particles

  2. small size of particles

  3. their  settling down nature

  4. none of above

Show answer
Correct Option: A
Explanation:

Suspension shows Tyndall effect because of their large size of particles. Particles of suspension are large enough to scatter rays of light and path of ray is visible through a suspension. 

Which of the following is intermediate between suspension and solution?

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. Mixture

  2. Colloid

  3. Element

  4. Solvent

Show answer
Correct Option: B
Explanation:

Colloidal solutions are heterogeneous mixture of two or more substances. They appear homogeneous. The size of colloids is between the size of particles of solution and suspension, i.e., between 1 nanometer to 1000 nanometer.

Apparatus used to sediment particles in supension is : 

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. centrifuge

  2. barometer

  3. balance

  4. calorimeter

  5. battery

Show answer
Correct Option: A
Explanation:

Apparatus used to sediment particles in supension is centrifuge.
Calorimeter is used to measure the heat absorbed or released by a reaction.
Barometer is used to measure pressure.
Balance is used to measure weight of a substance.
Battery is used to provide electricity.

Powder coating is a process which requires a solvent to keep the binder and filler parts in a liquid suspension form.

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form while liquid paints require.

Colour of colloids depends on which of the following factors?

chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

  1. Size

  2. Mass

  3. Charge

  4. Nature

Show answer
Correct Option: A
Explanation:

Colour of colloidal solution depends upon particle size.
The colour of colloidal solution changes with size of particle, eg, as particle size increases, the colour of gold solution changes from red to blue and finally to golden.