Extraction of Some Other Elements

Which of the following process is used in the extractive metallurgy of magnesium?

The chemical equations involved in the extraction of lead from galena by self-reduction process is

Galena is roasted in excess of air in a reverberatory furnace

$\mathrm{}\mathrm{}2PbS+\underset{\left(air\right)}{3O_2}\stackrel{}{\to }\mathrm{}\mathrm{}2PbO+\mathrm{}\mathrm{}2S{O}_2$

$PbS+2O_2\stackrel{}{\to }PbS{O}_4$

It is followed by self-reduction

$PbS+PbS{O}_4\stackrel{}{\to }\mathrm{}\mathrm{}2Pb+\mathrm{}\mathrm{}2S{O}_2$

$PbS+\mathrm{}\mathrm{}2PbO\stackrel{}{\to }\mathrm{}\mathrm{}3Pb+S{O}_2$

The cathode used in the electrolysis of potassium chloride is:

In the Down's process of extraction of sodium from molten sodium chloride, the reason for adding anhydride calcium chloride is:

The gas which gets collected at the anode in the electrolysis of molten $\mathrm{NaCl}$ is:

Brine solution is used to obtain $\mathrm{NaOH}, {\mathrm{Cl}}_2$ and ${\mathrm{H}}_2$ by electrolyzing it. The composition of brine is:

Cotyledons are also called-

In which process, fused sodium chloride is electrolysed for extraction of sodium?

Lime stone is added in the extraction of lead from galena why?

Principle in the dow’s process is

An ore of potassium is

Which one is an ore of sodium?

Which one of the following processes is used for manufacture of calcium?

In the extraction of sodium by Down's process, cathode and anode are respectively

In Down's method for the extraction of sodium, the melting point of the electrolyte is lowered by adding

Which one of the following reactions occur at the anode, in the Castner process of extracting sodium metal?

Calcium is obtained by

The methods chiefly used for the extraction of lead and tin from their ores are respectively

Which of the following represents the composition of carnallite mineral ?

Which one of the following electrolytes is used in Down's process of extracting sodium metal ?