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 chemistry basic analytical techniques partition coefficients solvent extraction separation methods

A student accidentally poured a blue liquid into a beaker of water in the laboratory. The blue liquid is immiscible in water and is denser than water. What must he use to separate the 2 liquids?

  1. Filter Funnel

  2. Displacement Can

  3. Separating Funnel

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

In separating funnel two liquids are separated depending upon their relative density. The liquid which is denser settles down below which can be separated and the liquid having lower density settled above.

Multiple choice chemistry basic analytical techniques partition coefficients solvent extraction separation methods

A mixture of chloroform and water taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be:

  1. chloroform

  2. water

  3. mixture of both

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As density of water is less than chloroform so upper layer will be of water while lower layer contains chloroform.

Multiple choice chemistry basic analytical techniques partition coefficients solvent extraction separation methods

Which of the following is the seperation technique to seperate mercury and water?

  1. Seperating funnel

  2. Sublimation

  3. Filteration followed by evaporation

  4. Seperating funnel followed by evaporation or distillation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

We can separate them using separating funnel because the two are immiscible and mercury is denser than water.

Multiple choice chemistry pure substances and mixtures: separation of mixtures dry methods of separation process of separating components of a mixture method of separation

The constituents of a heterogeneous mixture are X, Y and Z. 
If mixture of X and Y taken separately then, X can be separated using magnetic separation from Y. If mixture Y and Z is taken then it can be separated using distillation method.

Which of the following mixture can be X, Y, Z?

  1. Iron, salt, water.

  2. Sulphur, carbon disulphide, water.

  3. Gun powder, common salt, water.

  4. Iodine, sand, alcohol.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Iron (X) is magnetic and can be separated from salt (Y). Salt (Y) and water (Z) form a solution that can be separated by distillation. This matches the description.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

State a method to separate ammonium chloride from a mixture of ammonium chloride and potassium chloride.

  1. Sedimentation

  2. Sublimation

  3. Magnetic separation

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

Ammonium chloride sublimes on heating therefore it is easy to remove it by sublimation from a mixture of ammonium chloride and potassium chloride.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Which method can be used to separate two solid mixtures one of which dissolves in a particular solvent and other does not?

  1. Separating funnel

  2. Sublimation

  3. Magnetic separation

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

The two solid mixtures, one of which dissolves in a particular solvent and other does not, can be separated by solvent extraction method.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Iron and brass paper clips can be separated from each other by

  1. Magnetic separation

  2. Chromatography

  3. Centrifugation

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

Magnetism is a form of separating mixtures which involves using a magnet to attract another magnetic object away from the substance it is in. Iron gets attracted towards magnet and are separated from brass.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

The various methods for separation of solid-solid mixture includes:

  1. fractional distillation

  2. leaching

  3. magnetic separation

  4. centrifuge
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Fractional distillation is used to separate two liquid mixture based on difference in their boiling point.

centifuge is used to  separate solid from liquid,
Leaching and magnetic separation can be used to separate solid- solid mixture.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Which technique could be used to obtain the elements X and Y from the compound $XY$?

  1. Filtration

  2. Distillation

  3. Electrolysis

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

To separate elements X and Y from the compound XY we have to break it into ions,

and the process of breaking compound into its ions are known as electrolysis.