The answer lies in the structure of these molecules, CO2 is symmetrical molecule while N2O is unsymmetrical, thus for N2O, dipoles do not cancel each other, leaving the molecule with a resultant dipole, while the bond moment of CO2 cancel each other, so CO2 has no net dipole moment.
Related
Questions:
Question(1): Why aqueous solution of AlCl3 is acidic in nature ?
Question(2): What happen when aq AlCl3 react with Acid or Base?
Question(3): Although anhydrous aluminium chloride is
covalent but its aqueous solution is ionic in nature. Why?
Question(4): Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2,
AICI3, PCl5, SiCI4].
Question(5): Although Sulphur contain vacant d-orbital but SF6 does not undergo
hydrolysis. Why ?
Question(6): CCl4 can not be hydrolysed but SiCl4 can be. Why?
Question(7): What
are the hydrolysis products of urea ?
Question(8): Why
SF6 is inert where as SF4 is highly reactive towards H20
?.
Question(9): Why
SF6 behave inert towards hydrolysis?
Question(10): Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Question(11): Why hydrolysis
of NCl3 gives NH4OH and HOCl, while PCl3 on hydrolysis gives H3PO3 and HCl?