Coordination number of Na+ in NaCl crystal is
- 1
- 6
- 2
- 8
The Correct Option is B
Approach Solution - 1
In a NaCl crystal lattice, each Na+ ion is surrounded by six Cl- ions, and each Cl- ion is surrounded by six Na+ ions. The arrangement forms a face-centered cubic (FCC) structure.
This configuration ensures maximum stability through electrostatic attractions between oppositely charged ions, with each ion having a coordination number of 6. Therefore, the coordination number of Na+ in a NaCl crystal is 6.
Approach Solution -2
Explanation:
- In a NaCl (sodium chloride) crystal, the structure is a face-centered cubic (FCC) lattice.
- Each Na+ ion is surrounded by 6 Cl– ions, and vice versa.
- This arrangement gives both ions a coordination number of 6.
Correct Answer: 6
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Standard electrode potential for \( \text{Sn}^{4+}/\text{Sn}^{2+} \) couple is +0.15 V and that for the \( \text{Cr}^{3+}/\text{Cr} \) couple is -0.74 V. The two couples in their standard states are connected to make a cell. The cell potential will be:
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