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JEE Main Chemistry question

ChemistryThe Solid StateJEE Main

Not in JEE Main or NEET syllabus

At a particular temperature, an element undergoes the following transition: a bcc unit cell with density g cm transforms into an fcc unit cell, also with density g cm. The volume of the fcc unit cell is times that of the bcc unit cell.

Answer: 2

Solution

Since and , and are all the same before and after, the volume . With and

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Question ID VK-141862