A portion of a two – dimensional slab of NaCl(s) is shown below in which $C l^{-}$ ions are represented by circles and sodium ions are represented by solid balls. The ions are numbered

Regarding this the correct statements is/are

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The magnitudes of 1-5 and 3-5 interactions are equal and are larger than the magnitude of the 1-3 interaction.

The magnitude of the attractive 1-2 interactions is greater than the magnitude of the repulsive 1-5 interaction.

There is attraction between the ions having odd numbers and even numbers but there is repulsion between even-even and odd – odd numbered ions

Since the magnitude of the attractive 1-2 interaction is greater than the magnitude of the repulsive 1-5 interaction, the overall sum of interactions in the solid is attraction.

answer is A, B, C, D.

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Detailed Solution

All the odd numbered ions are one type and even number ions are another type. There will be attractive between oppositely charged ions and between the similar charged ions there will be repulsive forces. The magnitude of the 1-2 interaction is greater than the magnitude of the repulsive 1-5 interaction. This is because 1-2 distance is smaller than 1-5.
The overall attractive forces are more than the repulsive forces, since distance between attracting ions is lesser than the repelling ions. So the grid (lattice) in the solid has lower energy than a random collection of the same number and kinds of isolated ions. NaCl is a stable solid..

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