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 assertion and reason are true, and reason is the correct explanation of the assertion.

2. Both assertion and reason are true, but reason is not the correct explanation of the assertion.

3. Assertion is true but reason is false.

4. Assertion is false but reason is true.

Subtopic:  Ellingham Diagram |
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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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Assertion: Sulphide ores are concentrated by the froth flotation method.

Reason: Cresols stabilise the froth in the froth flotation method.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true but the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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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 |
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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 |
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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 the 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 |
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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 |
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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 Cu2S and ZnS.

c.  The solidified copper obtained from the reverberatory furnace has a blistered appearance due to the evolution of SO2 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 |
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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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology