Large number of impurities present in ore, such as sand, soil, etc., is called

Gangue refers to the unwanted impurities that are naturally present in an ore. These impurities do not contain the desired metal and should be removed during the ore refining process. Wrought is associated with wrought iron, which is a processed form of iron. Spongy refers to a texture of some metals but not related to ore impurities. Hardness of ore tells about the ore's physical property, not its impurities.