10. State two ways to prevent the
rusting of iron.
11. What type of oxides are formed when
non-metals combine with oxygen?
12. Give reasons
(a) Platinum, gold and silver are
used to make jewellery.
Sodium, potassium and
lithium are stored under oil.
(c) Aluminium is a highly reactive
metal, yet it is used to make
utensils for cooking.
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Answer:
10.by painting rusting of iron can be reduced
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