H2O has a net dipole moment but BeF2 has zero dipole moment. This is because:
A
H2O molecule is linear while BeF2 is bent
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B
BeF2 molecule is linear while H2O is bent
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C
Fluorine is more electronegative than oxygen
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D
Be is more electronegative than oxygen
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Solution
The correct option is BBeF2 molecule is linear while H2O is bent H2O has a bent shape and is sp3 hybridized with two lone pairs. So, it has a net dipole moment. Whereas, BeF2 molecule has sp hybridization with a linear geometry. Hence. the dipole moment vectors cancel out each other and have zero dipole moment.