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 chemistry fluid pressure examples of hydraulic press applications of pascal's law pascal's law and its applications

Write the correct alternatives :
In the Wilfley table method, the particles of gangue are separated by...................separation method.

  1. Magnetic

  2. Froth floatation

  3. Hydraulic

  4. Gravitational
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydraulic Washing :

In this method by flowing the powdered ore in a current of water, lighter rocky impurities can be washed away, for this, either wilfley table or Hydraulic classifier is used.

$\therefore$ option $"C"$ is correct.

Multiple choice isomerism of amines organic compounds with functional group containing nitrogen

In production of phenyl amine, it is separated from reaction mixture by process of :

  1. steam distillation

  2. extraction

  3. sublimation

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

Phenyl amines are prepared by steam distillation process. Amines are generally prepared by steam distillation process because of their volatility.

Multiple choice zoology excretion to maintain homeostasis haemodialysis kidney dialysis kidney disorders

The process used in separating larger particles from smaller ones in a solution is called

  1. Chromatography

  2. Dialysis

  3. Osmosis

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

The process of filtering the blood by the artificial kidney is known as dialysis. It is a method of removing excess water, nitrogenous wastes (urea), toxins from the blood in the patient who is rapidly developing loss of kidney function. In dialysis, the larger particles like proteins are separated from smaller particles(nitrogenous waste) in a solution called dialysis fluid.

So, the correct answer is 'Dialysis'.

Multiple choice chemistry changes around us crystallisation process of separating components of a mixture physical changes

Insoluble impurities from solution during crystallization are removed by :

  1. drying

  2. filtration

  3. heating

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

Heating is the process of increasing the temperature of a body from its original temperature.

Cooling is the process of decreasing the temperature of a body from its original temperature.
Filtration is the process of separating small particles of solid matter from a liquid, by causing the liquid to pass through the pores of some substance, called a filter.
Insoluble impurities from solution during crystallization are removed by filtration as the insoluble solid particles passed through the filter.
Drying is the process of drying up the liquid present on any material by heating the material.
Option B is correct.

Multiple choice chemistry changes around us crystallisation process of separating components of a mixture physical changes

Vacuum desiccator is used  _____ 

  1. for drying crystals

  2. for purifying crystals

  3. for separation of crystals

  4. for the process of crystallisation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Desiccators are an economical and reliable way to assure dry, dust-free storage and organization of humidity sensitive products valuable reagents in crystalline form. Proper storage conditions can be optimized by selecting a desiccator size, shape and control mechanism best suited for the application.
The lower compartment of the desiccator contains lumps of silica gel, anhydrous calcium chloride to absorb water vapor. The substance needing the desiccation is put in the upper compartment, on a glazed perforated ceramic plate. The ground glass rim of the desiccator lid must be greased with a thin layer of vacuum grease. 

Multiple choice chemistry changes around us crystallisation process of separating components of a mixture physical changes

The process of forming large crystals of pure substances from their solutions is known as __________.

  1. evaporation

  2. purification

  3. condensation

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

The process of forming large crystals of pure substances from their solutions is known as Crystallization. The principle of crystallization is concerned with the thermodynamic conditions of crystallization and the kinetics of crystal nucleation and growth.
Crystallization is the physical transformation of a liquid solution or gas to a crystal which is a solid with an ordered internal arrangement of molecules, ions or atoms.

Multiple choice applications of adsorption adsorption adsorption and colloids surface chemistry chemistry

In  physical adsorption Zeolite(A/B)'s  applications are  seperation of n-paraffins and i paraffins etc.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

There are several commercial applications based on this mechanism in adsorptive separation processes. One typical example is separating normal paraffin from iso-paraffin and aromatics in an adsorption process using zeolite 5A as an adsorbent.

Multiple choice applications of adsorption adsorption adsorption and colloids surface chemistry chemistry

For purification of tincture of alkaloids from pigments before determination of their alkaloidal content, adsorption column chromatography has been used for separation and purification of the Alkaloids of Atropa Belladonna from the bulk of non- alkaloidal matter present in alumina columns.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Adsorption Chromatography with alumina as the adsorbent may be used for the separation and purification of the Alkaloids of Atropa Belladonna from the bulk of non- alkaloidal matter present in alumina columns, whereas tincture prepared by the percolation process in adsorption column chromatography.

Multiple choice applications of adsorption adsorption adsorption and colloids surface chemistry chemistry

Application of adsorption is/are :

  1. For desiccation or dehumidification

  2. Heterogeneous catalysts

  3. For both heterogenous catalysts and for desiccation or dehumidification

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

Applications of adsorption are :

1.Charcoal is used as a decoloriser as it adsorbs the coloring matter from the coloured solution of sugar.

2. Silica gel adsorbs moisture from the desiccators.

3. Silica and alumina gels are used as adsorbents for removing moisture and for controlling humidity of rooms.

4. Activated charcoal is used in gas masks as it adsorbs all the toxic gases and vapours and purifies the air for breathing.

5 .Adsorption processes are useful in carrying out heterogeneous catalysis.

Multiple choice applications of adsorption adsorption adsorption and colloids surface chemistry chemistry

Application of adsorption chromatography is/are _________.

  1. separation of relatively non polar, water insoluble compounds

  2. seperation of isomers

  3. purification of antibody fragments

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

Adsorption chromatography has many applications. Generally, it is used for determining the concentration of a compound (or its purity), separating out a mixture into individual componentsseperation of isomers, and identifying what is in a mixture and seperate on the basis of solubility also. There are three main types of adsorption chromatography - column, thin layer, and gas-solid.

Multiple choice applications of adsorption adsorption adsorption and colloids surface chemistry chemistry

Adsorption column chromatography has been used for :

  1. isolation and purification of vitamins and hormones

  2. examination of vegetable oil and pharmaceutical preparations

  3. used as indicator

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

Column chromatography is used for isolation and purification of vitamins and hormones and for the examination of vegetable oil and pharmaceutical preparations.