Question:
Which of the following is covalent?
Which of the following is covalent?
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Smaller cation + higher charge = more covalent nature.
Updated On: May 1, 2026
- NaCl
- KCl
- BeCl$_2$
- MgCl$_2$
- CaCl$_2$
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The Correct Option is C
Solution and Explanation
Concept:
According to Fajan's rule, small cations with high charge polarize anions → covalent character.
Step 1: Analyze cation size.
Be$^{2+}$ is very small → high polarizing power.
Step 2: Effect on bonding.
Be$^{2+}$ distorts electron cloud of Cl$^-$ → covalent bonding.
Step 3: Conclusion.
BeCl$_2$ is covalent.
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