The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is

Step-by-step solution

The refining method liquation is used when the metal and the impurities have low and high melting temperatures, respectively. Liquationis a metallurgical method for separating metals from an ore or alloy. The material must be heated until one of the metals starts to melt and drain away from the other and can be collected. example: Tin