Question

Pb and Sn are extracted from their chief ore by

Solution

Correct option is

Self reduction and carbon reduction

 

PbO and PbSO4 get reduced by PbS itself which is already present in mixture, because the reduction takes place by mixture itself, hence is known as self reduction  

                

          

SIMILAR QUESTIONS

Q1

When a metal is to be extracted its ore, if the gangue associated with the ore is silica, then

Q2

Which statement is correct?

Q3

Flux is used to remove

Q4

The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction.

Q5

Auto-reduction process is used in the extraction of

Q6

Among the following groups of oxides, the group containing oxides that cannot be reduced by carbon to give the respective metal is

Q7

van-Arkel method of purification of metals involves converting the metal to a

Q8

A metal which is refined by poling is

Q9

Wolframite ore is separate from tin stone ore by the process of

Q10

‘Lapis-Lazuli’ is a blue coloured precious stone. It is mineral of the class