Which One Of The Following Ores Is Best Concentrated By Froth-floatation Method?

Bauxite ore is made up of Al₂O₃ + SiO₂ + TiO₂ + Fe₂O₃. This ore is treated with conc. NaOH solution at 500 K and 35 bar pressure for few hours and filtered when hot. In the filtrate, the species present are

When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurities. This can be removed as slag during reduction of CuO. The flux added to form slag is

Willemite is

The temperature of the slag zone in the metallurgy of iron using blast furnace is

The ore that is concentrated by froth floatation process is

Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of

Which of the following factors is of no significance for roasting sulphide ores to the oxidexs and not subjecting the sulphide ores to carbon reduction directly?

Calamine is

Extraction for zinc from zinc blende is achieved by

The method of zone refining of metals is based on the principle of