Molecule having non-polar as well as polar bonds but the molecule as a whole is polar : — p Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Analyze the symmetry and bonding of the options. B2Cl4 and I2Cl6 are highly symmetrical molecules with cancelable dipoles (non-polar overall). Step 2: Thiocyanogen, (SCN)2, is a pseudohalogen with an unsymmetrical open-book structure containing a non-polar disulfide (-S-S-) bond and highly polar covalent S-C and C-N bonds. Step 3: Because of its skewed, non-planar open-book geometry, the individual bond dipoles do not cancel out, leaving the molecule as a whole polar (net dipole moment μ ≠ 0). Thus, option (a) is correct.