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Q. No.Given below are two statements:
| Assertion (A): | Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminum |
| Reason (R): | Magnesium can reduce alumina. But the process will be uneconomical. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Ellingham Diagram |
64%
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Select the correct option based on statements below:
| Assertion (A): | Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal. |
| Reason (R): | Copper is extracted by hydrometallurgy. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
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Select the correct option based on statements below:
| Assertion (A): | The zone refining method is very useful for producing semiconductors. |
| Reason (R): | Semiconductors are of high purity. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Refining Process |
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Given below are two statements:
| Assertion (A): | Sulphide ores are concentrated by the froth flotation method. |
| Reason (R): | Cresols stabilise the froth in the froth flotation method. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
72%
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Select the correct option based on the statements below:
| Assertion (A): | Zirconium can be purified by the van Arkel method. |
| Reason (R): | ZrI4 is volatile and decomposes at 1800 K. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Refining Process |
81%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Nickel can be purified by Mond’s process. |
| Reason (R): | It is a volatile compound that decomposes at 460 K to give pure Ni. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Refining Process |
80%
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Given below are two statements:
| I: | The Ellingham diagram provides an idea about the feasibility of a reaction. |
| II: | The Ellingham diagram explains the rate of the reduction reactions. |
In light of the above statements, choose the most appropriate answer from the options given below:
| 1. | I is correct and II is incorrect. |
| 2. | I is incorrect and II is correct. |
| 3. | Both I and II are correct. |
| 4. | Both I and II are incorrect. |
Subtopic: Ellingham Diagram |
57%
From NCERT
NEET - 2022
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Among statements (I) – (IV), the correct ones are-
| (I) | Limestone is decomposed to CaO during the extraction of iron from its oxides |
| (II) | In the extraction of silver, silver is extracted as an anionic complex |
| (III) | Nickel is purified by Mond's process |
| (IV) | Zr and Ti are purified by the Van Arkel method |
1. (III) and (IV) only
2. (I), (III), and (IV) only
3. (II), (III), and (IV) only
4. (I), (II), (III), and (IV)
Subtopic: Metallurgy of individual elements | Refining Process |
64%
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Which of the following statements are correct?
a. A depressant prevents certain types of particles to come to the froth.
b. Copper matte contains and .
c. The solidified copper obtained from the reverberatory furnace has a blistered appearance due to the evolution of during the extraction.
d. Zinc can be extracted by self-reduction.
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
73%
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From the following, the correct statements about the role of substances added in the froth flotation process are:
| a. | Collectors enhance the non-wettability of the mineral particles. |
| b. | Collectors enhance the wettability of gangue particles. |
| c. | By using depressants in the process, two sulphide ores can be separated. |
| d. | Froth stabilisers decrease the wettability of gangue. |
1. a and b
2. b and c
3. c and d
4. a and c
Subtopic: Refining Process |
62%
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