Chemistry · Science General

Separation Techniques

842 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 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 materials we use soap and detergents soap soap and detergent

Process that produces soap from fats is called as:

  1. acidification

  2. saponification

  3. hydrolysis

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

Soaps are sodium or potassium salts of long chain fatty acids. When triglycerides in fat/oil react with aqueous $NaOH$ or $KOH$, they are converted into soap and glycerol. This is called alkaline hydrolysis of esters. Since this reaction leads to the formation of soap, it is called the Saponification process.

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.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

Separation of crystals of alum from impure sample is carried out through :

  1. centrifugation

  2. distillation

  3. crystallisation

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

Pure solids are removed as crystal from the solution through crystallisation. Crystallisation is used to purify solids, e.g., seperation of crystals of alum from impure samples.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

Crystallization is used to separate :

  1. solid from solid

  2. liquid from solid

  3. solid from liquid

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

Crystallisation is a sophisticated form of evaporation technique in which crystals of the solute are encouraged to develop during the process of dissolving out from the solution as the solvent evaporates.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

X is a solid. Y is a liquid. How can X be separated from a solution of Y?

  1. Sedimentation

  2. Filtration

  3. Crystallization

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

Sedimentation is the process of separating an insoluble solid from a liquid in which it is suspended by allowing it to settle to the bottom of the container. Filtration is used for separating insoluble solids from a liquid. Crystallisation is a sophisticated form of evaporation technique in which crystals of the solute are encouraged to develop during the process of dissolving out from the solution as the solvent evaporates.