MHT CET Chemistry question
Not in JEE Main or NEET syllabus
KCl crystallises in the same type of lattice as NaCl. Calculate the ratio of the side of the unit cell for KCl to that for NaCl (given = 0.55 and = 0.74)
Answer: (A)
Solution
Taking r(Cl-) = x: r(Na+) = 0.55x, r(K+) = 0.55x/0.74 = 0.743x; edge ∝ (r+ + r-), so ratio = 1.743/1.55 =
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