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Examples of Ionic Compounds

If the distan...

Question

If the distance between $N a^{+}$ and $C l^{-}$ ions in $N a C l$ crystal is $265 p m$ , then edge length of the unit cell will be?

265 p m

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530 p m

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795 p m

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132.5 p m

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Solution

The correct option is B $530 p m$
From the above structure it is clear that
Edge length of unit cell = 2 x (Distance between ${N a}^{+}$ & ${C l}^{-}$ ions)

$⟹ E d g e l e n g t h o f u n i t c e l l = 2 \times 265 = 530 p m$

Hence, Option "B" is the correct answer.

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