1st Year Chemistry Chapter 15 TestBasic Separation Techniques

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. For effective separation using simple distillation, the minimum required difference in boiling points between the components should be approximately:

   1. 5°C

   2. 10°C

   3. 15°C

   4. 25°C or more

2. Which of the following techniques is an example of partition chromatography?

   1. Column chromatography

   2. Thin layer chromatography

   3. Paper chromatography

   4. Size exclusion chromatography

3. The main function of a filter medium during filtration is to:

   1. Absorb the solid

   2. Mix the components of the mixture

   3. Trap the solid while allowing the liquid to pass through

   4. Dry the filtrate

4. A forensic scientist needs to identify different drug components in a blood sample.Which technique would be most suitable for this separation?

   1. Filtration

   2. Distillation

   3. Chromatography

   4. Evaporation

5. The most commonly used filter medium in laboratories is:

   1. Cotton cloth

   2. Muslin sheet

   3. Filter paper

   4. Plastic sieve

6. Impurities in a solution during crystallization usually remain:

   1. Attached to the crystals

   2. Dissolved in the mother liquor

   3. Suspended with crystals

   4. Evaporated with solvent

7. After crystals are formed, the remaining liquid is known as:

   1. Crystallized solution

   2. Solvent base

   3. Mother liquor

   4. Saturated filtrate

8. Which of the following is a real-life use of simple distillation?

   1. Separation of ink pigments

   2. Purification of drinking water

   3. Refining petroleum

   4. Extraction of perfume oils

9. The porous material used to separate the solid from the liquid during filtration is called the:

   1. Filtrate

   2. Residue

   3. Filter medium

   4. Solvent

10. Fractional distillation is ideal when liquids have:

    1. Insoluble solutes

    2. Solid substances

    3. Similar boiling points

    4. One component is a gas