Tag: separation of components of mixtures

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Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

 Gas separation in membranes occurs due to differences in ______of the species flowing through the membrane.

  1. Permeabilities

  2. Number of atoms

  3. Weight

  4. All of above
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

Gas separation is an important unit operation employedwidely throughout the chemical industries. Gas separation in membranes occurs due to differences in permeabilities of the species flowing through the membrane.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

A single container wherein the enrichment process takes place through gaseous diffusion is called

  1. Divider

  2. Diffuser

  3. Stalk

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

In a box with a semi-permeable membrane containing a mixture of two gases, the lighter molecules will pass out of the container more rapidly than the heavier molecules. The gas leaving the container is somewhat enriched in the lighter molecules, while the residual gas is somewhat depleted. A single container wherein the enrichment process takes place through gaseous diffusion is called a diffuser.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

Which of the following are the drawbacks of gaseous diffusion methods for separation of gases?

  1. Making and maintaining a suitable barrier

  2. Large energy consumption

  3. Long equilibrium times

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gaseous diffusion is unlikely to be the preferred technology of a proliferator due to difficulties associated with making and maintaining a suitable barrier, large energy consumption, the requirement for procuring large quantities of specialized stage equipment, large in-process inventory requirements, and long equilibrium times.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

In a box with a semi-permeable membrane containing a mixture of two gases

  1. The heavier molecules will pass out of the container more rapidly than the lighter molecules

  2. The lighter molecules will pass out of the container more rapidly than the heavier molecules

  3. Both heavier and lighter pass out of the container at equal rates

  4. Both a and c
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a box with a semi-permeable membrane containing a mixture of two gases, the lighter molecules will pass out of the container more rapidly than the heavier molecules. The gas leaving the container is somewhat enriched in the lighter molecules, while the residual gas is somewhat depleted. 

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

Which of the following is commonly used for removing the water layer from a system containing oil and water?

  1. Thermometer

  2. Separatory funnel

  3. Fiame spectrophotometer

  4. Burette

  5. Volumetric flask
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water and oil are immiscible and they form two separate layer, oil have less density than water, so it floats on the water surface so, the water and oil layer can easily be separated by the separatory funnel.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

Which statement explains why oxygen can be separated from nitrogen by the fractional distillation of liquid air?

  1. Oxygen is more dense than nitrogen

  2. Oxygen is more reactive than nitrogen

  3. The two elements have different boiling points

  4. The two gases are in different groups of the Periodic Table
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fractional distillation is a process of separation of mixtures based on the difference in their boiling points.

so, oxygen and nitrogen can be separated by fractional distillation because they have different boiling points.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

Which of the following processes enable pure water to be obtained from seawater?
I filtration
II distillation
III evaporation

  1. I and II only

  2. I and III only

  3. II and III only

  4. I,II and III
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Distillation and evaporation enables pure water to obtained from seawater,

both these process includes the evaporation of water and then condensing the water vapours to obtain pure form of water.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

During distillation, some porcelain chips are added to the mixture being distilled to ______________.

  1. make the distilling flask more stable

  2. purify the mixture

  3. raise the temperature

  4. make the boiling smoother
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Procelain chips are added to the mixture for two reasons: to prevent the superheating of liquid and to make the distilling flask more stable.