Q. No.Electrolytic refining is used to purify which of the following metals?
1. Cu and Zn
2. Ge and Si
3. Zr and Ti
4. Zn and Hg
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Answer the question on the basis of Figure
Choose the correct option of temperature at which carbon reduces FeO to iron and produces CO.
1. Below temperature at point A.
2. Approximately at the temperature corresponding to point A.
3. Above temperature at point A but below the temperature at point D.
4. Above temperature at point A.
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Match the items of Column I with items of Column II and assign the correct code:
Column I Column II
(A) Pendulum (1) Chrome steel
(B) Malachite (2) Nickel steel
(C) Calamine (3)
(D) Cryolite (4)
(5)
1. A (1) B (2) C (3) D (4)
2. A (2) B (4) C (5) D (3)
3. A (2) B (3) C (4) D (5)
4. A (4) B (5) C (3) D (2)
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Match the items of Column I with the items of Column II and assign the correct
code :
| Column I | Column II | ||
| (A) | Colored bands | (1) | Zone refining |
| (B) | Impure metal to volatile complex | (2) | Fractional distillation |
| (C) | Purification of Ge and Si | (3) | Mond Process |
| (D) | Purification of mercury | (4) | Chromatography |
| (5) | Liquation | ||
1. A =(1); B=(2); C=(4); D=(5)
2. A=(4); B=(3); C=(1); D=(2)
3. A=(3); B=(4); C=(2); D=(1)
4. A=(5); B=(4); C=(3); D=(2)
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Match the items of Column I with the items of Column II and assign the correct code :
Column I Column II
(A) Sapphire (1)
(B) Sphalerite (2) NaCN
(C) Depressant (3) Co
(D) Corundum (4) ZnS
(5)
1. A (3) B (4) C (2) D (1)
2. A (5) B (4) C (3) D (2)
3. A (2) B (3) C (4) D (5)
4. A (1) B (2) C (3) D (4)
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Match the items of Column I with items of Column II and assign the correct
code :
| Column I | Column II | ||
| (A) | Blistered Cu | (i) | Aluminium |
| (B) | Blast furnace | (ii) | 2Cu2O + Cu2S → 6Cu + SO2 |
| (C) | Reverberatory furnace | (iii) | Iron |
| (D) | Hall-Heroult process | (iv) | FeO + SiO2 → FeSiO3 |
| (V) | 2Cu2S + 3O2 → 2Cu2O + 2SO2 | ||
| Options: | (a) | (b) | (c) | (d) |
| 1. | ii | iii | iv | i |
| 2. | i | ii | iii | v |
| 3. | v | iv | iii | ii |
| 4. | iv | v | iii | ii |
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Which of the following is not a mineral of aluminium?
1. Bauxite
2. Cryolite
3. Gibsite
4. Malachite
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Galena contains ZnS with PbS. Which of the following is used as depressant to stop ZnS to come with foam?
1. NaCN
2. Aniline
3. Pine Oil
4. H2O
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