1.

The set having incorrect statement is 1. the Hall-Heroult process is used for the production of aluminum and iron 2. pig iron is obtained from cast iron. 3. the blistered appearance of copper during the metallurgical process is due to the evolution of CO_2 4. leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate

Answer»

1,2
2,3
1,2,3
1,2,4

Answer :C


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