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Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

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A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments.

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Differentiate between metal and non-metal on the basis of their chemical properties

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You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice.

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Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

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Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.

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Sodium, potassium and lithium are stored under oil.

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Platinum, gold and silver are used to make jewellery

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What type of oxides are formed when non-metals combine with oxygen?

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State two ways to prevent the rusting of iron.

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In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?

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Name two metals which will displace hydrogen from dilute acids, and two metals which will not.

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What are amphoteric oxides? Give two examples of amphoteric oxides.

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(b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

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(a) How could you use them to distinguish between samples of metals and non-metals?

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Food cans are coated with tin and not with zinc because (a) zinc is costlier than tin.

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An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water.

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Which of the following methods is suitable for preventing an iron frying pan from rusting? (a) Applying grease

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Which of the following pairs will give displacement reactions? (a) NaCl solution and copper metal

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What are alloys? answer

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