(a) How does the painting of an iron object prevent its rusting? (b) H – InterviewSolution

1.	(a) How does the painting of an iron object prevent its rusting? (b) How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper? (c) What is meant by 22-carat gold? Name the metals which are usually alloyed with gold to make it harder.
Answer» (a) How does the painting of an iron object prevent its rusting? (b) How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper? (c) What is meant by 22-carat gold? Name the metals which are usually alloyed with gold to make it harder.

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