Match the items in Column I with the items in Column II and assign the correct code.

 Codes

The method of purification that is represented by the following equation is:
\(Ti(s) \ + \ 2I_{2}(g) \ \xrightarrow[]{523 \ K} \ TiI_{4}{g}\)
\(TiI_{4}(g)\ \xrightarrow[]{1700 \ K} \ Ti(s) \ + \ 2I_{2}(g)\)

1. Cupellation

2. Poling

3. Van Arkel

4. Zone refining

Match the items in Column I with the items in Column II, and assign the correct code.

 Codes

In the process of extraction of silver,

silver ore + ${\mathrm{CN}}^{-}+$ ${\mathrm{H}}_2\mathrm{O}\stackrel{{\mathrm{O}}_2}{\to }$ $$ $$ $$ $$ $$ $\left[\mathrm{X}\right]$ $+$ ${\mathrm{OH}}_{}^{-}$

[X] + Zn $\to$ $$[Y] + Ag

[X], and [Y] in the above mentioned reaction are:

1. X= [Ag(CN)${}_2$]^$-$; Y = [Zn(CN)${}_4$]^-2

2. X= [Ag(CN)${}_2$]^-3; Y=[Zn(CN)${}_4$]^-2

3. X= [Ag(CN)${}_2$]^$-$; Y=[Zn(CN)${}_6$]^$-$

4. X=[Ag(CN)${}_4$]^$-$ ; Y= [Zn(CN)${}_4$]^$-$2 

From the following, the correct statements about the role of substances added in the froth flotation process are:

1. a and b
2. b and c
3. c and d
4. a and c

Which metal can be purified by zone refining?

1. Ni

2. Zr

3. In

4. Fe

The extraction of gold and silver involves leaching with CN^- ion. Silver is later recovered by:

1. Liquation

2. Distillation

3. Zone refining

4. Displacement with Zn

The correct match among the following is: