1. Calination
2. Roasting
3. Smelting
4. None of these
Calination
1. Fusion
2. Reduction
3. Sublimation
4. Decomposition
Sublimation
1. Zincite - Cassiterite
2. Siderite - Lime stone
3. Galena - Cinnabar
4. Sylvine - Anglesite
Sylvine - Anglesite
1. 90%
2. 75%
3. 20%
4. 0
0
1. Nitrogen and silicon
2. Oxygen and silicon
3. Oxygen and nitrogen
4. Oxygen and aluminium
Oxygen and silicon
1. Same as molten metal
2. Always greater than molten metal
3. Always less than molten metal
4. May be greater or less depending upon the nature of the metal
Always less than molten metal
1. Cu
2. Pb
3. Au
4. Pt
Pb
1. Gypsum
2. Dolomite
3. Magnesite
4. Carnallite
Gypsum
1. Sylvanite
2. Anglesite
3. Sylvine
4. None of these
Sylvanite
1. Malachite
2. Azurite
3. Copper glance
4. Cuprite
Copper glance