Tag: chemistry

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

How would you confirm that a colourless liquid given to you is pure water?

  1. By tasting it

  2. By determining the boiling point of the liquid

  3. By its volume measurement

  4. All of the above is done to check the purity of water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

By determining the boiling point of the liquid and comparing it with a colourless liquid, we can confirm whether it is pure water or not

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

Diffusion technique of separation can be used for :

  1. Separation of oxygen from air

  2. Recovery of hydrogen in oil refinery

  3. Separation of methane in bio gas

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

Gas mixtures can be effectively separated by synthetic membranes made from polymers such as poly-amide or cellulose acetate, or from ceramic materials. It can be used for separation of nitrogen or oxygen from air. Helps in Recovery of hydrogen in oil refinery processes. Also used in Separation of methane from the other components of bio gas.

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

Liquefaction of gases helps in :

  1. storing a gas in a compact form

  2. transporting a gas easily

  3. both a and b

  4. none of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The most important advantage of liquefying gases is that they can then be stored and transported in much more compact form than in the gaseous state. Two kinds of liquefied gases are widely used commercially for this reason, liquefied natural gas (LNG) and liquefied petroleum gas (LPG).

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.