MHT CET Chemistry question

Chemistry The Solid State MHT CET

Not in JEE Main or NEET syllabus

Lithium iodide crystal has a face centred cubic unit cell. If the edge length of the unit cell is 550 pm, determine the ionic radius of ion

(A)144.4 pm
(B)294.4 pm
(C)194.4 pmCorrect
(D)164.4 pm

Answer: (C)

Solution

Li⁺ is small, so the large I⁻ ions touch each other along the face diagonal of the fcc cell: , so $r =

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Question ID VK-043102