MHT CET Chemistry question

Not in JEE Main or NEET syllabus

If the edge length of a NaH unit cell is 488 pm, what is the length of Na-H bond if it crystallizes in the fcc structure?

Answer: (B)

Solution

NaH has the rock-salt (fcc) structure where the cation-anion contact is along the edge, so the bond length is

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Question ID VK-042758