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Which of the following species is polar (has a net dipole moment)?

A. BF₃
B. NCl₃
C. CF₄
D. NO₃⁻
E. BeCl₂

Sagot :

Mikeking6304idn

Answer: B. NCl₃ (Nitrogen trichloride)

Explanation:

NCl₃ has a trigonal pyramidal structure due to the lone pair on nitrogen, with bond angles slightly less than 109.5°. The N-Cl bonds are polar, and the asymmetrical shape causes the dipole moments to not cancel out completely. NCl₃ is polar.

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