Chemistry · Science General

Separation Techniques

813 Questions

Separation techniques involve physical methods to isolate mixtures, including distillation, filtration, and crystallization. Competitive exams frequently test these foundational concepts. Review the exact processes to enhance problem solving speed.

Distillation and evaporationCrystallization processFiltration methodsSeparating dissolved solidsChromatography and mass techniques

Separation Techniques Questions

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter
A very large quantity of mixture contains tiny particles of three different substances X, Y, and Z. They are of the same size, cubical in shape and yellow in colour. X particles are very heavy, insoluble, non-magnetic and contribute 50% of the mixture. Y particles are very light, insoluble, non-magnetic and contribute 40% of the mixture. And Z particles are actually iron pieces. Which of the following methods can separate X, Y?

  1. Distillation

  2. Decantation

  3. Centrifugation

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

Particle X and Y are having same size, shape and colour but they are having different masses, 

particle X is heavy whereas particle Y is light,
so, based on this particle X and Y can be separated by centrifugation.

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

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 manipulation of dna electrophoresis isolation and separation of dna

The technique used for separating molecules by passing electric current is

  1. Fractionation

  2. Centrifugation

  3. Electrophoresis

  4. ELISA

  5. Chromatography
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Electrophoresis is a technique, in which particles of different sizes and charges are separated due to their movement to different distances under the influence of an electric field, e.g : nucleic acid, proteins, amino acids, nucleotides etc.
Chromatography is a technique of separating molecular components of a mixture by using the principle of partition coefficient.
Cell fractionation is the technique of separating and rupturing cells and separating the cellular components for study. It has two steps - homogenisation (rupturing of cells) and differential centrifugation (separation of different components of homogenate). 
ELISA stands for Enzyme Linked immunosorbent Assay. It is an assay procedure used in diagnosis of AIDS.
Multiple choice bio-chemistry biochemical techniques manipulation of dna electrophoresis isolation and separation of dna

A method which uses paper or film with different electric poles at the two ends and is used for separation of charged particles is called

  1. Electrolysis

  2. Electrophoresis

  3. Electroplating

  4. Thin layer chromatography
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electrophoresis is the technique used to separate charged particles (like DNA or proteins) by applying an electric field across a gel or medium.

Multiple choice salts salts and their classification acids, bases and salts chemistry

An insoluble salt can be made by mixing two solutions of soluble salts in a process is called :

  1. neutralization

  2. precipitation

  3. ionization

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

An insoluble salt can be made by mixing two solutions of soluble salts in a process is called precipitation. Two solutions of soluble compounds can be used, each of which provides one of the two ions required to combine and precipitate out as the insoluble salt.

Multiple choice biology wastewater story origin of waste products waste generation waste and its types

Find the odd one out:

  1. Electrodialysis

  2. Ion exchange chromatography

  3. Reverse osmosis

  4. Electrostatic precipitator
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water gets contaminated due to industrial effluents, sewage water, radio biological pollutants etc. These can be purified by several techniques like electodialysis, Ion exchange chromatography, Reverse osmosis etc.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

Which of the following method of separation is used to separate heavier and lighter components of a mixture by wind or by blowing air?

  1. winnowing

  2. handpicking

  3. threshing

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

The method of separation that is used to separate heavier and lighter components of a mixture by wind or by blowing air is winnowing.