1. If a metal's ore is titled 'pyrites', then it most probably contains _______.   chlorine   oxygen   nitrogen   sulfur   Hint Half-n-half Clue   2. Metals are obtained from their oxides by the process of _______.   electrolytic separation   roasting   reduction   oxidation   Half-n-half Clue   3. Which metal is extracted from the ore 'bauxite'?   Iron   Gold   Aluminum   Tungsten   Half-n-half Clue   4. Which of the following metals is often found in the pure state?   Gold   Aluminum   Magnesium   Iron   Half-n-half Clue   5. An alloy is _______.   a compound of three elements   a mixture of three elements   an element in the impure form   a solid solution of two or more metals   Half-n-half Clue   6. Rust on iron is basically _______.   a chloride   a nitride   an oxide   a sulphide   Half-n-half Clue   7. To prevent corrosion, metals are often galvanized by covering them with a layer of _______.   copper   tin   zinc   sodium   Half-n-half Clue