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Question

Which of the following is/are ore(s) of copper?


A

Brass

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B

German silver

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C

Solder

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D

Stainless steel

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Solution

The correct options are
A

Brass


B

German silver


An alloy is a substance prepared by adding one or more metals or non-metals to the base metal.

Brass = copper + zinc

German silver = copper + zinc + nickel

Solder = lead + tin

Stainless steel = iron + nickel + chromium + carbon


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