JEE Main202311 Apr 2023Evening ShiftChemistryChemical Bonding and Molecular StructureActual
Which one of the following pairs is an example of polar molecular solids?
Options
- ASO 2 (   s ) , CO 2 (   s )
- BSO 2 (   s ) , NH 3 (   s )
- CMgO ( s ) , SO 2 s
- DHCl ( s ) , AlN ( s )
Correct answer
B. SO 2 (   s ) , NH 3 (   s )
Step-by-step solution
SO 2 is a bent molecule with a central sulfur atom bonded to two oxygen atoms. The oxygen atoms are more electronegative than sulfur, causing a separation of charge. This results in a bent molecular geometry and a net dipole moment, making SO 2 a polar molecule. NH 3 is a trigonal pyramidal molecule with a central nitrogen atom bonded to three hydrogen atoms. Again, the electronegativity difference between nitrogen and hydrogen leads to a separation of charge. The arrangement of the atoms in NH 3 gives it a net dip