JEE Main Chemistry question

Which of the following is arranged in decreasing order of dipole moment?

(A)CH_3Cl,\ CH_3Br,\ CH_3F
(B)CH_3Cl,\ CH_3F,\ CH_3BrCorrect
(C)CH_3Br,\ CH_3Cl,\ CH_3F
(D)CH_3Br,\ CH_3F,\ CH_3Cl

Answer: (B)

Solution

Dipole moment depends on both bond polarity (electronegativity difference) and bond length. has the largest dipole moment overall; , despite fluorine's very high electronegativity, has a shorter, less polarisable bond, giving it a somewhat smaller

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Question ID VK-148209