Vapour phase refining can be carried out in case of
(1) Ni
(2) Zr
(3) Ti
(4) All of the above
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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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Which of the following metal is purified by distillation process?
1. Zn
2. Fe
3. Al
4. Cu
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The purest form of iron is-
1. Cast iron
2. Steel
3. Wrought iron
4. Grey cast iron
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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
Which is mismatched?
1. Zincite - ZnO
2. Calamine -
3. Siderite -
4. Malachite -
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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 a carbonate ore?
1. Siderite
2. Zincite
3. Calamine
4. Dolomite
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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