Go through the following question and provide the answer:
A mining company extracts three metals X, Y and Z from the earth’s crust. Metal X occurs in the free state and does not react with air or moisture. Metal Y occurs as sulphide/oxide ores and is extracted using carbon, while metal Z is highly reactive, reacts with water, and is extracted only by electrolysis. The ore of metal Y contains sand and rocky impurities.
i. Metal X is most likely to be:
ii. The impurities present in the ore of metal Y are called: