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Statement 1: In NaCI crystal each Na⁺ ion is touching 6 Cl^- ions but these Cl^- ions do not touch each other.
Statement 2: The radius ratio is greater than 0.414 required for exact fitting.

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Both Statement 1 and Statement 2 are true.

Statement 1 is true but Statement 2 is false.

Both Statement 1 and Statement 2 are false.

Statement 1 is false but Statement 2 is true.

answer is A.

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Detailed Solution

NaCl has F.C.C arrangement with radius ratio ( $\frac{r_{c +}}{r_{a -}})$ 0.52 which lies between 0.414 and 0.732 and thus has a co-ordination number of 6.

The radius ratio is greater than 0.414 required for exact fitting.

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