1. Which of the following does not belong to this group?   Lead   Sodium   Oxygen   Iron   Hint Half-n-half Clue   2. Which metal is extracted from the ore 'bauxite'?   Gold   Tungsten   Aluminum   Iron   Half-n-half Clue   3. Rocks that are rich in metals are known as _______.   ores   slag   metalloids   allotropes   Half-n-half Clue   4. An alloy is _______.   a mixture of three elements   an element in the impure form   a solid solution of two or more metals   a compound of three elements   Half-n-half Clue   5. Metals are obtained from their oxides by the process of _______.   oxidation   electrolytic separation   roasting   reduction   Half-n-half Clue   6. Which metal is extracted from the ore 'hematite'?   Iron   Tin   Manganese   Aluminum   Half-n-half Clue   7. Brass is _______.   a mixture   an alloy   a compound   an element   Half-n-half Clue