Aluminium is extracted from alumina Al2O3 by electrolysis of a molten mixture of:

1. Al2O3+HF+NaAlF4

2. Al2O3+CaF2+NaAlF4

3. Al2O3+Na3AlF6+CaF2

4. Al2O3+KF+Na3AlF6

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
 78%
From NCERT
AIPMT - 2012
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In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:

1. Copper(l) sulphide (Cu2S)

2. Sulphur dioxide (SO2)

3. Iron Sulphide (FeS)

4. Carbon monoxide (CO)

Subtopic:  Metallurgy of individual elements |
 81%
From NCERT
AIPMT - 2012
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Which of the following elements is present as an impurity to the maximum extent in the pig Iron?
1. Carbon
2. Silicon
3. Phosphorus
4. Manganese

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
 81%
From NCERT
AIPMT - 2011
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A pair of metals that can be purified by van Arkel method is:

1. Zr and Ti

2. Ag and Au

3. Ni and Fe

4. Ga and In

Subtopic:  Metallurgy of individual elements | Refining Process |
 91%
From NCERT
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh