Refining Methods

Question 1

refining methods

Answer 1

1. electrolytic refining
2. poling
3. sweating
4. cupellation
5. zone refining
6. chromatography
7. vapour phase refining

Question 2

zone refining is used for

Answer 2

to obtain metals with high purity
specially semiconductors
Si, Ge, B, Ga, In

Question 3

principle of zone refining

Answer 3

impurities are mre soluble in molten part

Question 4

types of vapour phase refining

Answer 4

1. Mond’s process

2. Van Ankel’s process

Question 5

mond’s process is used for

Answer 5

Ni

Question 6

Van Ankel’s process is used for

Answer 6

Ti

Zr

Question 7

principle of vapour phase refining

Answer 7

metal combines with suitable molecule > form volatile compound > then decomposed to form metal

Question 8

reagant of Van Ankel’s Process

Answer 8

I2

Question 9

reagant for Mond’s Process

Answer 9

Water Gas
CO + H2
synthesis gas
syn gas

Question 10

complex in mond’s process

Answer 10

[Ni(CO)4]

Question 11

Ti + I2 =

Answer 11

TiI4

Question 12

in chromatography, tube is filled with

Answer 12

adsorbent material

Question 13

adsorbent material forms in chromatography

Answer 13

stationery phase

Question 14

solvent forms in chromatography

Answer 14

mobile phase

Question 15

principle of chromatography

Answer 15

one is more soluble in stationery phase and another is more soluble in mobile phase