Roasting process is applied to which of the following ores?

Which of the following metal can be extracted by smelting?

The chemical reagent used for leaching of gold and silver ores is

The most abundant ore of iron is

The chemical composition of ‘slag’ formed during smelting process in the extraction of copper is

The incorrect statement among the following is

Which of the following is used in thermite welding?

Zinc metal is refined by

The froth floatation process is based upon

In Goldschmidt aluminothermic process, reducing agent used is