Q. No.Which of the following is leached with NaCN?
1. Ore of Al
2. Ore of Cu
3. Ore of Ag
4. Ore of Zn
1. Ore of Al
2. Ore of Cu
3. Ore of Ag
4. Ore of Zn
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In the metallurgy of copper, matte contains
1. Cu2S + Cu2O
2. Cu2S + FeS
3. FeS + FeO
4. Cu2O + FeO
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Out of following which metal can be purified by Van Arkel method?
(1) Ti
(2) Zr
(3) Hf
(4) All of the above
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Bauxite, an ore of aluminium is purified by
1. Hall's process
2. Serpeck's process
3. Bayer's process
4. All of the above
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The ore having two different metal atoms is
1. Haematite
2. Galena
3. Magnetite
4. Copper pyrites
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