1. Which of the following metals is liquid at room temperature   Sodium   Mercury   Cadmium   Tungsten   Hint Half-n-half Clue   2. Sodium is very reactive and may burn on exposure to air, hence it is kept under   Water   Oil   Ice   Acids   Half-n-half Clue   3. Often to prevent corrosion, metals are galvanized by covering them with a layer of   Sodium   Tin   Zinc   Copper   Half-n-half Clue   4. Which metal is extracted from Bauxite?   Aluminum   Arsenic   Gold   Tungsten   Half-n-half Clue   5. Which of the following metals is often found in pure state?   Aluminum   Gold   Iron   Magnesium   Half-n-half Clue   6. Rocks rich in metals are known as   Ores   Metalloids   Slag   Allotropes   Half-n-half Clue   7. Rust on iron is basically   A Sulphide   A Chloride   A Nitride   An Oxide   Half-n-half Clue