Question

 

Lead is extracted from galena (PbS), either by following ways.  

   

Auto-reduction process is                         

Solution

Correct option is

II

 

In auto-reduction, no external reducting agent is required. In such a reduction reaction, the product formed acts as a reducing agent and reduces the oxide to metal. Thus, only reaction II is called auto-reduction. 

                

                

  Product (acts reducing agent)

SIMILAR QUESTIONS

Q1

The chemical process in the production of steel from haematite ore involves

Q2

Which of the following process involves smelting? 

Q3

 

FeCr2O4 (chromite) is a good source of chromium and its compounds like Na2CrO4 and Na2Cr2O7

   

   

    

     

Identify A

Q4

Consider  (CuO) = –129.7 kJ mol–1 kJ mol –1and  The better reducing agent for the reduction of CuO is

Q5

In which of the following isolations no reducting agent is required?

Q6

Which of the following pairs of oxides cannot be reduced by carbon to give the respective metals?   

Q7

Titanium containing mineral found in our country is