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Q. No.Which of the following reaction corresponds to Mond’s process ?
1. \(\mathrm{ZrI}_4 \stackrel{1800 \mathrm{~K}}{\longrightarrow} \mathrm{Zr}+2 \mathrm{I}_2\)
2. \(\mathrm{Ni}(\mathrm{CO})_4 \stackrel{450-470 \mathrm{~K}}{\longrightarrow} \mathrm{Ni}+4 \mathrm{CO} \)
3. \(2\left[A u(C N)_2\right]^{-}(a q)+Z n(s) \rightarrow 2 A u(s)+\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}(a q)\)
4. \(2 \mathrm{Al}_2 \mathrm{O}_3+3 \mathrm{C} \rightarrow 4 \mathrm{Al}+3 \mathrm{CO}_2\)
1. \(\mathrm{ZrI}_4 \stackrel{1800 \mathrm{~K}}{\longrightarrow} \mathrm{Zr}+2 \mathrm{I}_2\)
2. \(\mathrm{Ni}(\mathrm{CO})_4 \stackrel{450-470 \mathrm{~K}}{\longrightarrow} \mathrm{Ni}+4 \mathrm{CO} \)
3. \(2\left[A u(C N)_2\right]^{-}(a q)+Z n(s) \rightarrow 2 A u(s)+\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}(a q)\)
4. \(2 \mathrm{Al}_2 \mathrm{O}_3+3 \mathrm{C} \rightarrow 4 \mathrm{Al}+3 \mathrm{CO}_2\)
Subtopic: Refining Process |
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Match the following from column I and column II.
1. (a) – (i) ; (b) – (ii) ; (c) – (iii)
2. (a) – (ii) ; (b) – (iii) ; (c) – (i)
3. (a) – (iii) ; (b) – (ii) ; (c) – (i)
4. (a) – (ii) ; (b) – (i) ; (c) – (iii)
| Column I | Column II | ||
| a. | Siderite | i. | ZnCO3 |
| b. | Galena | ii. | FeCO3 |
| c. | Calamine | iii. | PbS |
1. (a) – (i) ; (b) – (ii) ; (c) – (iii)
2. (a) – (ii) ; (b) – (iii) ; (c) – (i)
3. (a) – (iii) ; (b) – (ii) ; (c) – (i)
4. (a) – (ii) ; (b) – (i) ; (c) – (iii)
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
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Match the following in column I with column II and choose the correct combination:
1. (A – 1); (B – 3); (C – 4); (D – 2)
2. (A – 2); (B – 3); (C – 4); (D – 1)
3. (A – 3); (B – 2); (C – 1); (D – 4)
4. (A – 2); (D – 4); (C – 1); (D – 3)
| Column I | Column II | ||
| (A) | Aluminium | 1. | Electrolysis |
| (B) | Iron | 2. | Reverberatory Furnace |
| (C) | Silicon | 3. | Blast furnace |
| (D) | Copper | 4. | Zone refining |
1. (A – 1); (B – 3); (C – 4); (D – 2)
2. (A – 2); (B – 3); (C – 4); (D – 1)
3. (A – 3); (B – 2); (C – 1); (D – 4)
4. (A – 2); (D – 4); (C – 1); (D – 3)
Subtopic: Metallurgy of individual elements |
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The role of \(SiO_2 \) in Cu extraction is:
1. Converts FeO to \(FeSiO_3 \)
2. Converts CaO to \(CaSiO_3 \)
3. Reduces \(Cu_2S \) to Cu
4. None of these
1. Converts FeO to \(FeSiO_3 \)
2. Converts CaO to \(CaSiO_3 \)
3. Reduces \(Cu_2S \) to Cu
4. None of these
Subtopic: Metallurgy of individual elements |
Level 4: Below 35%
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Match column-I with column-II and select the correct option:
| Column I | Column II |
| (i) Gold (Au) | (a) SO2 |
| (ii) Blister Copper | (b) NaOH |
| (iii) Al2O3 | (c) NaCN |
| (iv) Froth stabilizer | (d) Aniline |
| I | II | III | IV | |
| 1. | c | a | b | d |
| 2. | a | b | c | d |
| 3. | b | c | d | a |
| 4. | c | b | a | d |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
89%
Level 1: 80%+
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Match List-I with List-II and select the correct option:
| List-I | List-II | ||
| (I) | Calamine | (a) | ZnS |
| (II) | Sphalerite | (b) | \(ZnCO_3 \) |
| (III) | Galena | (c) | PbS |
| (IV) | Siderite | (d) | \(FeCO_3 \) |
| Options: | (I) | (II) | (III) | (IV) |
| 1. | a | b | c | d |
| 2. | b | a | c | d |
| 3. | b | a | d | c |
| 4. | d | c | b | a |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
84%
Level 1: 80%+
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In the extraction of copper, the following reaction takes place, \(FeO+SiO_2\rightarrow FeSiO_3 \)
In the above reaction, \(FeO \) and \(FeSiO_3 \) act as a/an respectively:
1. Flux, Slag
2. Slag, Flux
3. Gangue, Slag
4. Slag, Flux
In the above reaction, \(FeO \) and \(FeSiO_3 \) act as a/an respectively:
1. Flux, Slag
2. Slag, Flux
3. Gangue, Slag
4. Slag, Flux
Subtopic: Metallurgy of individual elements |
52%
Level 3: 35%-60%
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The role of depressants in 'Froth Flotation method' is to:
| 1. | selectively prevent one component of the ore from coming to the froth. |
| 2. | reduce the consumption of oil for froth formation. |
| 3. | stabilize the froth. |
| 4. | enhance non-wettability of the mineral particles. |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
72%
Level 2: 60%+
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| Statement I: | In the electro-refining of blister copper precious metals are obtained in anode mud. |
| Statement II: | Pure copper is obtained by the above method |
| 1. | Both Statement I and Statement II are true. |
| 2. | Both Statement I and Statement II are false. |
| 3. | Statement I is True while Statement II is false. |
| 4. | Statement I is False while Statement II is true. |
Subtopic: Refining Process |
76%
Level 2: 60%+
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| Statement-I: | In the Ellingham diagram metal oxide, having a higher value of \(\Delta G \) is more stable, than metal oxide has less \(\Delta G\) value. |
| Statement-II: | In the Ellingham diagram, lower metal will reduce uppers metal from its oxide. |
Select true (T) and false (F) regarding these statements respectively.
1. T, T
2. F, F
3. T, F
4. F, T
Subtopic: Ellingham Diagram |
58%
Level 3: 35%-60%
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