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The chief constituent and impurity of th...

The chief constituent and impurity of the gemstone 'Ruby' respectively are

A

`Al_(2)O_(3), Cu`

B

`Al_(2)O_(3), Cr`

C

`CrO_(3), Cu`

D

`Cr_(2)O_(3), Al`

Text Solution

Verified by Experts

The correct Answer is:
B
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