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NEET 2018 Chemistry question

ChemistryThe Solid StateNEET 2018

Not in JEE Main or NEET syllabus

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

Answer: (1)

Solution

Density . bcc: , body diagonal , so . fcc: , face diagonal , so . $ = ( =

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Question ID VK-092283