1.

Iron exhibits bcc structure at room tempera­ture. Above 900^(@)C, it transforms to fee structure. The ratio of density of iron at room temperature to that at 900^(@)C (assuming molar mass and atomic radii of iron remains constant with temperature) is

Answer»

`(3sqrt(2))/(4sqrt(2))`
`(4sqrt(3))/(3sqrt(2))`
`SQRT(3)/sqrt(2)`
`1/2`

ANSWER :A


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