Give reasons: (3 marks) (i) platinum, gold and silver are used to make jewellery. (ii) sodium, potassium and lithium are stored under oil. (iii) aluminium is a highly reactive metal, still it is used to make utensil for cooking.
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1 because they are lustrous and less reactive and not corrode easily
2 because metals such as sodium and potassium react vigorously and they catch fire easily if it kept in the open hence them to prevent accident fires they are kept immersed in oil
because aluminium forms an oxide layer on its surface which protects it from rusting hence it is used to be cooking utensils
2 because metals such as sodium and potassium react vigorously and they catch fire easily if it kept in the open hence them to prevent accident fires they are kept immersed in oil
because aluminium forms an oxide layer on its surface which protects it from rusting hence it is used to be cooking utensils
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