47
MCQ (Single Correct Answer)
Match items of Column I with the items of Column II and assign the correct code.
| Column I | Column II | ||
|---|---|---|---|
| A. | Cyanide process | 1. | Ultrapure Ge |
| B. | Froth floatation process | 2. | Dressing of ZnS |
| C. | Electrolytic reduction | 3. | Extraction of Al |
| D. | Zone refining | 4. | Extraction of Au |
| 5. | Purification of Ni |
A
A - 4, B - 2, C - 3, D - 1
B
A - 2, B - 3, C - 1, D - 5
C
A - 1, B - 2, C - 3, D - 4
D
A - 3, B - 4, C - 5, D - 1
48
MCQ (Single Correct Answer)
Match the items of Column I with the items of Column II nd assign the correct code.
| Column I | Column II | ||
|---|---|---|---|
| A. | Sapphire | 1. | $\mathrm{Al_2O_3}$ |
| B. | Sphalerite | 2. | $\mathrm{NaCN}$ |
| C. | Depressant | 3. | $\mathrm{Co}$ |
| D. | Corundum | 4. | $\mathrm{ZnS}$ |
| 5. | $\mathrm{Fe_2O_3}$ |
A
A - 3, B - 4, C - 2, D - 1
B
A - 5, B - 4, C - 3, D - 2
C
A - 2, B - 3, C - 4, D - 5
D
A - 1, B - 2, C - 3, D - 4
49
MCQ (Single Correct Answer)
Match the items of Column I with items of Column II and assign the correct code.
| Column I | Column II | ||
|---|---|---|---|
| A. | Blisterred Cu | 1. | Aluminium |
| B. | Blast furnace | 2. | $\mathrm{2Cu_2O+Cu_2S\longrightarrow 6Cu+SO_2}$ |
| C. | Reverberatory furnace | 3. | Iron |
| D. | Hall-Heroult process | 4. | $\mathrm{FeO+SiO_2\longrightarrow FeSiO_3}$ |
| 5. | $\mathrm{2Cu_2S+3O_2\longrightarrow 2Cu_2O+2SO_2}$ |
A
A - 2, B - 3, C - 4, D -1
B
A - 1, B - 2, C - 3, D - 5
C
A - 5, B - 4, C - 3, D -2
D
A - 4, B - 5, C - 3, D -2
50
MCQ (Single Correct Answer)
Assertion (A) Nickel can be purified by Mond's process.
Reason (R) $\mathrm{Ni}(\mathrm{CO})_4$ is a volatile compound which decomposes at 460 K to give pure Ni.
A
Both assertion and reason are true and reason is the correct explanation of assertion.
B
Both assertion and reason are true but reason is not the correct explanation of assertion.
C
Assertion is true but reason is false.
D
Assertion is false but reason is true.
E
Assertion and reason both are wrong.
51
MCQ (Single Correct Answer)
Assertion (A) Zirconium can be purified by van Arkel method.
Reason (R) $\mathrm{ZrI}_4$ is volatile and decomposes at 1800 K .
A
Both assertion and reason are true and reason is the correct explanation of assertion.
B
Both assertion and reason are true but reason is not the correct explanation of assertion.
C
Assertion is true but reason is false.
D
Assertion is false but reason is true.
E
Assertion and reason both are wrong.