Distillation

Q.

Question 12

Which of the following is (are) an endothermic process(es)?

(i) Dilution of sulphuric acid.
(ii) Sublimation of dry ice.
(iii) Condensation of water vapours.
(iv) Evaporation of water.

(a) (i) and (iii)
(b) (ii) only
(c) (iii) only
(d) (ii) and (iv)

Q. Which method is used for the purification of low boiling metals like zinc and mercury containing high boiling metals as impurities?

1. Distillation
2. Poling
3. Electrolysis
4. Liquation

Q.

The metal that can be refined by distillation is:

1. tin
2. mercury
3. copper
4. iron

Q.

How will you separate a mixture of benzene and toluene?

Q.

Suggest the possible methods of separation of liquid-gas mixtures. Explain each method with an example.

Q. The method used for refining metals with low boiling points like zinc and mercury is:

1. distillation
2. electrolytic refining
3. froth floatation
4. magnetic separation

Q. The most important characteristic for the separation of two substances through distillation is:

1. Difference in size
2. None of these

3. Difference in boiling point

4. Difference in weight

Q. The method used for refining metals with low boiling points like zinc and mercury is:

1. distillation
2. electrolytic refining
3. froth floatation
4. magnetic separation

Q. Which amongst the following metals can be refined by distillation?

1. mercury
2. iron
3. copper
4. tin

Q. Which among the following metals is refined by distillation?

1. Mercury
2. Iron
3. Copper
4. Tin

Q. The substance has boiling point $563K$, but it starts decomposing near this temperature. Which type of distillation process is suitable for its purification?

1. Distillation
2. Fractional distillation
3. Steam distillation
4. Distillation under reduced pressure

Q. Which among the following solution can be used as an electrolyte for the electrorefining of copper?

1. $\text{AgCl}$
2. ${\text{CuSO}}_4$
3. ${\text{AgNO}}_3$
4. ${\text{FeSO}}_4$

Q.

How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25° C) which are miscible with each other?

Q.

Non-volatile metals are refined by distillation.

1. True

2. False

Q. Which among the following metals is refined by distillation?

1. Mercury
2. Iron
3. Copper
4. Tin

Q. The principle behind the separation of two substances through distillation is difference in _____ between gangue and ore particles.

1. weight
2. boiling point
3. size
4. melting point

Q. The principle behind the separation of two substances through distillation is difference in _____ between gangue and ore particles.

1. weight
2. boiling point
3. size
4. melting point

Q.

Define distillation.

Q. The method used for refining metals with low boiling points like zinc and mercury is:

1. distillation
2. electrolytic refining
3. froth floatation
4. magnetic separation

Q. The principle behind the separation of two substances through distillation is difference in _____ between gangue and ore particles.

1. weight
2. boiling point
3. size
4. melting point

Q.

Which of the tubes in Fig. (a) and (b) will be more effective as a condenser in the distillation apparatus?

10

Q.

The metal that can be refined by distillation is:

1. mercury
2. iron
3. copper
4. tin

Q.

good afternoon experts i am asking you one of my difficulty that is WHAT IS THE MEANING OF DISTILLATION ? WHAT IS IT USED FOR ? WHAT IS ITS FORM?

Q. Silver containing lead as an impurity is not purified by:

1. Distillation
2. Cupellation
3. Poling
4. Levigation

Q. The method used for refining metals with low boiling points like zinc and mercury is:

1. distillation
2. froth floatation
3. electrolytic refining
4. magnetic separation