Which are the most abundant elements present inside the earth's crust?

1. Al, and Fe 

2. Al, and Cu

3. Fe, and Cu

4. Cu, and Ag

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 82%
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

Zone refining is based on the principle that-

1. Impurities of low-boiling metals can be separated by distillation.
2. Impurities are more soluble in molten metal than in solid metal.
3. Different components of a mixture are differently adsorbed on an adsorbent.
4. Vapours of volatile compounds can be decomposed in pure metal.

Subtopic:  Refining Process |
 82%
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

Extraction of gold and silver involves leaching the metal with CN- ion. The metal is recovered by ......

1. Displacement of metal by some other metal from the complex ion.
2. Roasting of metal complex.
3. Calcination followed byroasting.
4. Thermal decomposition of metal complex.

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 90%
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

 

The temperature at which carbon reduce FeO to Fe and produce CO is:

1. Lower than  400 oC

2. 400 oC

3. Higher than 600 oC

4. Higher than 400 oC

Subtopic:  Ellingham Diagram |
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 correct statement among the following regarding the reaction of FeO below point A in the above diagram is:

 
1. Reduced by carbon monoxide only.

2. Reduced by both carbon monoxide and carbon.

3. Reduced by carbon only.

4. Not  reduced by both carbon and carbon monoxide.

Subtopic:  Ellingham Diagram |
 54%
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 correct statement for the reduction of FeO at the temperature corresponding to point D is: 
 

  

1. ∆G value for the overall reduction reaction with carbon monoxide is zero.
2. ∆G value for the overall reduction reaction with a mixture of 1 mol carbon, and 1 mol oxygen is positive.
3. ∆G value for the overall reduction reaction with a mixture of 2 mol of carbon, and 1 mol of oxygen will be positive.
4. ∆G value for the overall reduction reaction with carbon monoxide is negative.

Subtopic:  Ellingham Diagram |
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