1. With which metal does oxygen combine to form rust?   Silver   Gold   Platinum   Iron   Hint Dica Meio-a-meio   2. Which of the following metals is often found in pure state?   Aluminum   Iron   Magnesium   Gold   Dica Meio-a-meio   3. Rust on iron is basically   A Nitride   A Chloride   An Oxide   A Sulphide   Dica Meio-a-meio   4. Metals are obtained from their oxides by   Oxidation   Roasting   Reduction   Electrolytic Separation   Dica Meio-a-meio   5. Which metal is extracted from Haematite?   Iron   Manganese   Cadmium   Tin   Dica Meio-a-meio   6. An alloy is a   Element in impure form   Mixture   Solid Solution of two or more metals   Compound of three elements   Dica Meio-a-meio   7. Which of the following does not belong to the group?   Oxygen   Iron   Lead   Sodium   Dica Meio-a-meio