In purification of bauxite ore, it is mixed with coke and heated at `1800^(@)C` in presence of nitrogen, this is `:`

Ag_(2)S ore Is mixed with NaCl and heated in the presence of air then products formed are

When diamond is heated at 1800 - 2000^(0) C in vaccum it converts into

When bauxite powder is mixed with coke and reacted with nitrogen at 2075 K, carbon monoxide and X are formed. What is the gas formed when X is reacted with water?