Chemistry - Solid State Question with Solution | TestHub

ChemistrySolid StateMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

Sodium chloride has rock salt structure, how many molecules are there in the unit cell of $N a C l$

Options:

Answer:

Solution:

In $N a C l$ (rock salt): Number of $N a^{+}$ ions $= 12$ (at edge centers) $\frac{1}{4} + 1$ (at body centre) × 1 =4.
Number of $C l^{-}$ ions $= 8$ (at corners) $\times \frac{1}{8} + 6$ (at face centre) $\times \frac{1}{2} = 4$ .
Thus $4$ formula units per unit cell.

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Solid StateSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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