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

The correct method to dilute acid is

  1. by adding water into concentrated acid

  2. by adding concentrated acid in to water gradually with stirring

  3. both (1) & (2)

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

Diluting concentrated acid is highly exothermic. Adding acid to water allows the water to absorb the heat, whereas adding water to acid can cause the water to boil instantly and splash concentrated acid.

Multiple choice

Which method of separation is incorrectly matched with its process?

  1. Winnowing---Separate grains from husk, lighter particles, etc.

  2. Threshing---Cutting the leaves and grains from the stalk

  3. Handpicking----Separate stones or hugs by hand picking

  4. Sieving----Separates flour from husks
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

No, threshing is actually hitting the stalk hard on the ground to separate the grains. Hence, it is the incorrect pair.

Multiple choice

Mixture of sand, iron and water can be separated by

  1. filtration and handpicking

  2. decantation and handpicking

  3. filtration and magnetic separation

  4. decantation and magnetic separation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is correct. First filtration is done in which sand and iron are retained on the filter paper, then with the help of magnet, iron particles are separated and sand is left behind.

Multiple choice

The process used to separate a mixture of ammonium chloride and iodine is ______.

  1. sublimation

  2. magnetic separation

  3. solvent extraction

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

Solvent extraction is a process whereby two immiscible liquids are vigorously shaken in an attempt to disperse one in the other so that solutes can migrate from one solvent to the other. The picture on the right shows the shape of a traditional separatory funnel.