Pls ans q8 ASAP
Class 11
Chemical bonding
Solution:
NH3 it is a trigonal pyramidal, N−H bond is least polar.
SO2 is bent with 1 lone pair and O−S bond is more polar, greater dipole moment
H2O is bent with 2 lone pairs and H−O bond is more polar, greater bond angle, greater dipole moment
In HF,H−F bond is the most polar with no cancelling effect.
The polarity of molecules decreases with a decrease in dipole moment.
(The dipole moment of HF,H2O,SO2 and NH3 are 1.92D,1.84D,1.60D and 1.49D respectively)
Hence, correct order of decreasing polarity is-
HF>H2O>SO2>NH3
NH3 it is a trigonal pyramidal, N−H bond is least polar.
SO2 is bent with 1 lone pair and O−S bond is more polar, greater dipole moment
H2O is bent with 2 lone pairs and H−O bond is more polar, greater bond angle, greater dipole moment
In HF,H−F bond is the most polar with no cancelling effect.
The polarity of molecules decreases with a decrease in dipole moment.
(The dipole moment of HF,H2O,SO2 and NH3 are 1.92D,1.84D,1.60D and 1.49D respectively)
Hence, correct order of decreasing polarity is-
HF>H2O>SO2>NH3