Q3 of 400 Page 191

State two ways to prevent the rusting of iron.

The two ways to prevent the rusting of iron are :-

1) by painting it,


2) prevention can also be done by applying grease or oil over it.



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1 A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula. 2 What chemical process is used for obtaining a metal from its oxide? 4 What is meant by galvanization ? Why is it done? 5 Name the metal which is used for galvanising iron.