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Allotropes of Carbon

What is the p...

Question

What is the percentage of carbon in hard steel?

A

0.1 to 0.4

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B

1.5 to 2.5

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C

2.5 to 3.5

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D

0.5 to 1.5

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Solution

The correct option is D 0.5 to 1.5
Hard steel usually refers to quenched or quenched and tempered steel.

The percentage of carbon in hard steel is 0.5 to 1.5.

Hence, option $D$ is correct.

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