Q. No.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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Which of the following is not an ore of silver?
1. Pyrargyrite
2. Argentite
3. Anglesite
4. All of the above
For which of the following metals, distillation method is used for purification ?
1. Zn
2. Cd
3. Hg
4. All of the above
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