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5) i) An underground iron pipe is less likely to corrode if it is bonded...

5) i) An underground iron pipe is less likely to corrode if it is bonded at intervals with magnesium rods. Give reasons for this observation.
ii) State the stages involved in the rusting of iron.
iii) State the condition for the rusting of iron in water.
a) What is a spontaneous reaction?
b) State two condition s that could make a reaction spontaneous?

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