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Identify the alloy containing a non meta...

Identify the alloy containing a non metal as a constitunt in it

A

Invar

B

Steel

C

Bell metal

D

Bronze

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The correct Answer is:
A
Invar is an alloy containing `63.8%` iron, `36%` nickel, `0.2%` carbon that has a very low coefficient of expansion. It is used for balance wheels of watches and in other accurate instruments, which would otherwise be affected by temperature changes.
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