H_2O has a net dipole moment, while BeF_2 has zero dipole moment, because

JEE Main Chemistry question

has a net dipole moment, while has zero dipole moment, because

(A)The molecule is linear while is bent
(B)The molecule is linear while is bentCorrect
(C)Fluorine is more electronegative than oxygen
(D)Be is more electronegative than oxygen

Answer: (B)

Solution

is linear (-hybridized Be, no lone pairs), so its two equal Be–F bond dipoles point in exactly opposite directions and cancel completely, giving zero net dipole moment. is bent

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Question ID VK-133413