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When heated above 916^(@)C, iron cha...

When heated above `916^(@)C`, iron changes its bcc crystalline from to fcc without the change in the radius of atom . The ratio of density of the crystal before heating and after heating is :

A

`1.089`

B

`0.918`

C

`0.725`

D

`1.231`

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The correct Answer is:
B
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