ChemistryMedium99×since 2002Q1383The correct statement is :Aleaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicateBthe Hall-Heroult process is used for the production of aluminium and ironCpig iron is obtained from cast ironDthe blistered appearance of copper during the metallurgical process is due to the evolution of CO₂Check answerSkip