What happens in the extraction of chlorine by electrolysis of brine?

1. Oxidation of Cl- ion to chlorine gas occurs.

2. Reduction of Cl- ion to chlorine gas occurs.

3. For overall reaction G° has negative value.

4. A displacement reaction takes place.

Subtopic:  Metallurgy of individual elements |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

What does copper matte contain?

1. Sulphides of copper(I), and iron(II)

2. Sulphides of copper (II), and iron(III)

3. Sulphides of copper(II), and iron(II)

4. Sulphides of copper(I), and iron(III)

Subtopic:  Metallurgy of individual elements |
 59%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following reactions is an example of autoreduction?

1. Fe3O4+ 4CO 3Fe+ 4CO2

2.  Cu2O+ C2Cu+ CO

3.  Cu2+aq + Fes Cus +Fe2+aq

4. Cu2O+12Cu2S3Cu+12SO2

Subtopic:  Metallurgy of individual elements |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu2S with :
1. FeS   
2. CO
3. Cu2O   
4. SO2

Subtopic:  Metallurgy of individual elements |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Brine is electrolysed by using inert electrodes. The reaction at the anode is:

1. Cl-(aq) → \(\frac{1}{2}\)Cl2(g) + e-\(E_{cell}^{o}\) = 1.36 V

2. 2H2O(l) → O2(g) + 4H+ +  4 e-;  \(E_{cell}^{o}\) = 1.23 V

3. Na+(aq) + e- → Na(s); \(E_{cell}^{o}\) = 2.71 V

4. H+(aq) + e-\(\frac{1}{2}\)H2(g); \(E_{cell}^{o}\) = 0.00 V

Subtopic:  Metallurgy of individual elements |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the metallurgy of aluminium:

1. Al3+ is oxidised to Al(s).
2. The graphite anode is oxidised to carbon monoxide and carbon dioxide.
3. Oxidation state of oxygen change in the reaction at the anode.
4. The oxidation state of oxygen changes in the overall reaction involved in the process.

Subtopic:  Metallurgy of individual elements |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following metals can be purified by electrolytic refining?

1. Cu, and Zn     

2. Ge, and Si     

3. Zr, and Ti     

4. Zn, and Hg

Subtopic:  Metallurgy of individual elements |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the extraction of aluminium by the Hall-Heroult process, purified Al2O3 is mixed with CaF2 to:

a. Lower the melting point of Al2O3
b. Increase the conductivity of the molten mixture.
c. Reduce Al3+into Als
d. Act as a catalyst

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and d

Subtopic:  Metallurgy of individual elements |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the froth flotation process, how can zinc sulphide and lead sulphide be separated?

a. Using collectors.

b. Adjusting the proportion of oil to water.

c. Using depressants.                                          

d. Using froth stabilizers.

Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Metallurgy of individual elements |
 61%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The common impurities present in bauxite are:

a. CuO                    

b. ZnO                

c. Fe2O3                

d. SiO2

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and d

Subtopic:  Metallurgy of individual elements |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh