Aluminium is extracted from alumina Al2O3 by electrolysis of a molten mixture of:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology