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Separation Techniques

Learn and practice various chemical separation techniques including filtration, distillation, chromatography, decantation, fractional distillation, and crystallization

10 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following methods would not be used to separate an insoluble solid from a liquid?

  1. Decantation
  2. Evaporation
  3. Filtration
  4. Chromatography
Question 2 Multiple Choice (Single Answer)

Alcohol and water are easily separated by distillation because of their

  1. different boiling points
  2. different colours
  3. different densities
  4. all of the above
Question 3 Multiple Choice (Single Answer)

Sodium chloride can be separated from sand by first adding water to the mixture to dissolve the sodium chloride. The separation then takes place in two stages, which are

  1. filtration followed by decantation
  2. distillation followed by decantation
  3. filtration followed by evaporation
  4. evaporation followed by filtration
Question 4 Multiple Choice (Single Answer)

Which one of the following techniques would best be used to separate soil and water?

  1. Chromatography
  2. Decantation
  3. Fractional distillation
  4. Filtration
Question 5 Multiple Choice (Single Answer)

A crystal can be formed by _____.

  1. heating a saturated solution
  2. cooling a saturated solution
  3. stirring a saturated solution
  4. all of the above
Question 6 Multiple Choice (Single Answer)

Name the method that would be used to obtain petrol (boiling point 20 – 60°C) from a mixture of petrol and kerosene (boiling point 180 – 220°C).

  1. Fractional distillation
  2. Decantation
  3. Chromatography
  4. Filtration
Question 7 Multiple Choice (Single Answer)

A chalk which is settled at the bottom of a beaker filled with water can be separated from the water by ________ and _____. The chalk can then be dried by ______.
(a) sedimentation and crystallisation; condensation
(b) decantation and filtration, evaporation
(c) filtration and evaporation; crystallisation

  1. Only (a)
  2. Only (b)
  3. Only (b) and (c)
  4. Only (c)
Question 8 Multiple Choice (Single Answer)

Which of the following liquid - liquid mixtures cannot be separated by a separating funnel?

  1.     Benzene and water

  2.     Kerosene oil and water

  3.     Ethyl alcohol and water

  4.     Acetone and ethyl alcohol
  1. 1 and 2
  2. 3 and 4
  3. 1 and 3
  4. 2 and 4
Question 9 Multiple Choice (Single Answer)

Consider the information given below about methods of separation, types of mixtures and nature of mixtures.
Which of the following is/are incorrectly matched?

     
S. No. Method Type of mixture Nature of mixture
1. Magnetic separation Solid-Solid Heterogeneous
2. Fractional distillation Liquid-Solid Heterogeneous
3. Separating funnel Liquid-Liquid Heterogeneous
4. Filtration Liquid-Liquid Heterogeneous
  1. Only 1
  2. Both 2 and 3
  3. Both 2 and 4
  4. Only 2
Question 10 Multiple Choice (Single Answer)

Different properties of three processes P, Q and R are given in the table below. Identify the processes by choosing the correct code from the given alternatives.

 
Processes Properties
P Used to separate suspended particles from water
Q Used to separate immiscible liquids
R Used to separate a mixture of NaCl and water
  1. P – Filtration, Q – Separating funnel, R – Distillation
  2. P – Distillation, Q – Filtration, R – Separating funnel
  3. P – Sedimentation, Q – Filtration, R – Chromatography
  4. P – Sublimation, Q – Separating funnel, R – Distillation
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