Which one of the following pairs is an example of polar molecular solids ?
HCl (s), AlN (s)
- MgO (s), SO2(s)
- SO2(s), NH3(s)
- SO2(s), CO2(s)
The Correct Option is C
Solution and Explanation
Polar molecular solids are formed by polar molecules held together by dipole-dipole interactions. Let us analyze the given compounds:
- \( \text{SO}_2 \): \( \text{SO}_2 \) has a bent structure with a net dipole moment, making it a polar molecule. It forms polar molecular solids.
- \( \text{NH}_3 \): \( \text{NH}_3 \) has a trigonal pyramidal structure and a net dipole moment, making it polar. It also forms polar molecular solids.
- \( \text{CO}_2 \): \( \text{CO}_2 \) is linear and nonpolar, so it does not form polar molecular solids.
- \( \text{MgO} \): \( \text{MgO} \) is an ionic solid and does not belong to polar molecular solids.
- \( \text{HCl} \): \( \text{HCl} \) is a polar molecule and can form polar molecular solids.
- \( \text{AlN} \): \( \text{AlN} \) is an ionic solid and does not form polar molecular solids.
Conclusion:
Final Answer: The pair \( (\text{SO}_2(s), \text{NH}_3(s)) \) is an example of polar molecular solids.
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