Q1. Although both CO2 and H2O are triatomic molecules shape of H2O is bent and CO2 is linear.Explain these on basis of dipole moment??
Q2. Explain why BeH2 molecules has a zero dipole moment although Be____H bond are polar??
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Q1. Although both CO2 and H2O are triatomic molecules shape of H2O is bent and CO2 is linear.Explain these on basis of dipole moment??
Q2. Explain why BeH2 molecules has a zero dipole moment although Be____H bond are polar??
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Question 15
Although both CO2 and H2O are triatomic molecules, the shape of H2O molecule is bent while that of CO2 is linear. Explain this on the basis of dipole moment.
Answer
Dipole moment is the product of the magnitude of the positive or negative charge (q) & the distance (d) between the charges,i.e
μ = q x d.
The SI unit is coulomb metre.The molecule with symmetrical & linear geometries have zero dipole moment because they are vector in nature & the dipole of different bonds cancel with one another. CO2 is symmetrical & has dipole moment 0.Therefore it will have a linear shape with bond angle 180°.
Resultant μ = 0 D
H2O is a unsymmetrical molecule & bent geometries, the geometries have specific dipole moment (1.84D) because the bond polarities do not cancel each other. Therefore H2O will have a bent structure with bond angle 104°.