MHT CET Chemistry question

Not in JEE Main or NEET syllabus

The density of KBr is 2.75 . Length of the unit cell is 654 pm. K = 39, Br = 80. Then what is TRUE about the predicted nature of the solid?

Answer: (A)

Solution

z = ρa³N0/M = 2.75 × (6.54 × ³ × 6.022 × /119 = 3.9, i.e. 4, which is face centred cubic (NaCl

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Question ID VK-042970