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Relation Between r and a

Potassium flu...

Question

Potassium fluoride has $N a C l$ type structure. What is the distance between $K^{+}$ and $F^{-}$ ion if cell edge is $a c m$ ?

2 a c m

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a / 2 c m

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4 a c m

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a / 4 c m

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Solution

The correct option is D $2 a c m$
Distance between $K^{+}$ and $F^{-} = \frac{1}{2} \times$ length of the edge.
A is correct option

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