Engineering Chemistry I Mock Test 3

10%

Question 1 of 10

1. The solution of impure compound and solvent is concentrated to get ____________

Saturated solution

Oversaturated solution

Unsaturated solution

Undersaturaed solution

Question 1 of 10

Question 2 of 10

2. Which of the following property is not possessed by the organic solvent required to separate organic compound with water?

It is easily vaporisable

It is immiscible with water

Organic compound is more soluble in it

It is less volatile than water

Question 2 of 10

Question 3 of 10

3. Which of the following gases cannot be separated from air using fractional distillation?

Oxygen

Nitrogen

Argon

Helium

Question 3 of 10

Question 4 of 10

4. If the mobile phase is gas, movement of solute is determined by its ____________

Boiling point

Melting point

Solubility

Volatility

Question 4 of 10

Question 5 of 10

5. Which of the following will vaporize faster?

Aniline

Kerosene

Water

Chloroform

Question 5 of 10

Question 6 of 10

6. Steam distillation process is used to separate substances which are ____________

Steam volatile

Steam volatile and immiscible with water

All of the mentioned

Steam volatile and miscible with water

Question 6 of 10

Question 7 of 10

7. The mixture of petroleum ether and benzene is used in the elution ratio of ____________

1 : 5

1 : 9

1 : 12

1 : 2

Question 7 of 10

Question 8 of 10

8. Crystallisation is based on the ____________

Difference in boiling point

Difference in melting point

Difference in pressure

Difference in solubility

Question 8 of 10

Question 9 of 10

9. Which of the following is the example of crystallisation process?

None of the mentioned

Separation of gases from air

Purification of sea water

Purification of alum

Question 9 of 10

Question 10 of 10

10. The size of a thin layer of adsorbent is about ____________

0.1 mm

0.2 mm

0.3 mm

0.4 mm

Question 10 of 10