In: Chemistry
Explain how a molecule can have polar bonds but have no molecular polarity. Name the compounds that have bond polarity but no molecular polarity ( out of CH4, CF4, NH3, NF3, H2O, OF2, CO2, CH2F2).
CH4 having C-H bond polarity but the shape of the molecule is tetrahedral so it is not having moleclar polarity.
CF4 having C-F bond polarity but the shape of the molecule is tetrahedral so it is not having moleclar polarity.
NH3 having N-H bond polarity & the shape of the molecule is pyramidal so it is having moleclar polarity.
NF3 having N-F bond polarity & the shape of the molecule is pyramidal so it is having moleclar polarity.
H2O having O-H bond polarity & the shape of the molecule is angular so it is having moleclar polarity.
OF2 having O-F bond polarity & the shape of the molecule is angular so it is having moleclar polarity.
CO2 having O-C bond polarity & the shape of the molecule is linear so it is not having moleclar polarity.
CH2F2 having C-F bond polarity & the shape of the molecule is tetrahedral even though due to unsymmetry it is having moleclar polarity.
Therefore CH4, CF4 & CO2 having bond polarity but no molecular polarity .