ANS:A - No

Basic flux is used for the extraction of metal from its self-fluxing ores. Self-fluxing ores contain fluxing agents within themselves, which means they don't require additional fluxing agents to be added during the smelting process. Basic fluxes are often used in conjunction with these ores to help facilitate the removal of impurities and improve the efficiency of the extraction process. Basic fluxes typically consist of basic compounds such as limestone (calcium carbonate) or dolomite (calcium magnesium carbonate). During the smelting process, these basic fluxes react with acidic impurities, forming slag that can be easily separated from the molten metal. This helps to purify the metal and improve its quality.