1. Bauxite
2. Magnetite
3. Smaltite
4. Haematite
Haematite
1. Greater solubility of impurities in the molten state than in the solid
2. Greater solubility of pure metal than that of the impurity
3. Higher melting point than that of the pure metal
4. Greater noble character of the solid metal than that of the impurity
Greater solubility of impurities in the molten state than in the solid
1. Refining
2. Roasting
3. Calcination
4. Concentration
Concentration
1. Calcium phosphate
2. Calcium ammonium phosphate
3. Calcium silicate
4. Tricalcium silicate and calcium phosphate
Tricalcium silicate and calcium phosphate
1. Cu
2. Pb
3. Au
4. Pt
Pb
1. Si
2. Ge
3. Si and Ge
4. Si and Bi
Si and Ge
1. Blister copper is
2. Alloy of copper
3. Copper containing some impurity
4. Ore of copper
Copper containing some impurity
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. Oxide ores
2. Silicate ores
3. Sulphide ores
4. Sulphide ores
Sulphide ores
1. Steel
2. Cr
3. Ni
4. Ag
Steel