Tag: centrifugation

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Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

If the constituents of a solid-liquid mixture have different masses, then we can separate them using:

  1. sublimation

  2. centrifugation

  3. winnowing

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

Centrifugation is a separation process which uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture. Two distinct major phases are formed in the vessel during centrifugation .It is best method for separating of mixture have different masses for example removing of cream from milk.

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

Which of the following devices uses the process of centrifugation?

  1. Washing machine

  2. Ceramic water filter

  3. Household ultraviolet (UV) purifier

  4. Distillation tower
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the process of centrifugation, we use a rotator and because of that the heavier particles in the solution get settled at the bottom and we get a clear solution, in washing machine we are having rotator at the bottom and hence it can be used for the process of centrifugation.

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

Centrifugation is used for :

  1. separation of miscible liquids

  2. separation of immiscible liquids

  3. separation of immiscible gases

  4. all of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Centrifugation is used to separate two immiscible substances. More dense components of the mixture migrate away from the axis of the centrifuge, while less dense components of the mixture migrate towards the axis. 

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

Centrifugation is a process which involves the application of the :

  1. centripetal force

  2. gravitational force

  3. friction

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

Centrifugation is a process which involves the application of the centripetal force for the sedimentation of heterogeneous mixtures with a centrifuge, and is used in industrial and laboratory settings.

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

Which of the following is an application of centrifugation?

  1. Pathological test of blood and urine

  2. Preparing lactic cultures

  3. Washing machine

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

In the method of centrifugation, the centripetal and centrifugal forces are used to separate lighter and heavier components of mixture of two immiscible liquids. It can be used in pathological test of blood and urine, in washing machines to squeeze the water from wet clothes and to prepare lactic cultures for production of cheese in dairies.

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

In a centrifuge, more-dense components of the mixture__of the centrifuge, while less-dense components of the mixture ___.       

  1. migrate away from the axis, migrate towards the axis

  2. migrate towards the axis, migrate away from the axis

  3. both a and b

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

Centrifugation is a process which involves the application of the centripetal force for the sedimentation of heterogeneous mixtures with a centrifuge, and is used in industrial and laboratory settings. This process is used to separate two immiscible substances. More-dense components of the mixture migrate away from the axis of the centrifuge, while less-dense components of the mixture migrate towards the axis. 

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

What forces out the water from fabric in washing machine?

  1. Magnetic force

  2. Frictional force

  3. Force of attraction

  4. Centrifugal force
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Centrifugation is a process used to separate or concentrate materials suspended in a liquid medium. When you wash clothes in a washing machine, it is the centrifugal force generated in the "spin" cycle that forces water out of the fabric to facilitate faster drying.

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

Colloids may be more than a thousand times as big as an atom but are more than a thousand times smaller than an ant. These colloids can be removed from a solution by:

  1. Thin piece of cloth

  2. Centrifuge

  3. Filter paper

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

Particles of colloids range from $1-100$ $nm$ which is very small than pores of filter paper, thin piece of cloth or parchment paper so can't be separated by them but can be separated by ultra filtration and centrifuge