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%
From NCERT
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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 |
From NCERT
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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 |
From NCERT
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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%
From NCERT
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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 1.   Aluminium
B Blast furnace 2. 2Cu2O + Cu2S →  6Cu  + SO2
C Reverberatory furnace 3. Iron
D Hall-Heroult process 4. FeO   +   SiO2   →   FeSiO3
5. 2 Cu2S   +   3O2   →   2Cu2O + 2SO2
 

 Codes: 

Options:  A   B   C   D  
1.  2 3 4 1
2. 1 2 3 5
3. 5 4 3 2
4. 4 5 3 2

     

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 82%
From NCERT
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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.              Sapphire

1.            Al2O3

B.             Sphalerite

2.            NaCN

C.             Depressant

3.            Co

D.             Corundum

4.            ZnS

5.            Fe2O3

 Codes

           A         B          C          D

1.       3          4           2           1

2.       5          4           3           2

3.       2          3           4           5

4.       1          2           3           4

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 85%
From NCERT
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Match the items in Column I with the items in Column II, and assign the correct code.

Column I Column II
A. Cyanide process 1. Ultrapure Ge
B. Froth flotation process 2. Dressing of ZnS
C. Electrolytic reduction 3. Extraction of Al
D. Zone refining 4. Extraction of Au

5. Purification of Ni

 Codes

A B C D
1. 4 2 3 1
2. 2 3 1 5
3. 1 2 3 4
4. 3 4 5 1

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Refining Process |
 84%
From NCERT
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Match the items in Column I with the items in Column II and assign the correct code.

Column I Column II
A. Coloured Bands 1. Zone refining
B. Impure metal to volatile complex 2. Fractional distillation
C. Purification of Ge and Si 3. Mond’s process
D. Purification of mercury 4. Chromatography

5. Liquation

 Codes

A B C D
1. 1 2 3 4
2. 4 3 1 2
3. 3 4 2 1
4. 5 4 3 2

Subtopic:  Refining Process |
 92%
From NCERT
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Match the items in Column I with the items in Column II and assign the correct code.

Column I Column II
A. Pendulum 1. Chrome steel
B. Malachite 2. Nickel Steel
C. Calamine 3. Na3AlF6
D. Cryolite 4. CuCO3. Cu (OH)2

5. ZnCO3


Codes

A B C D
1. 1 2 3 4
2. 2 4 5 3
3. 2 3 4 5
4. 4 5 3 2
Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 89%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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