Chemical BondingMedium
Question
Among $H_{2}\text{ }S,H_{2}O,{NF}_{3},{NH}_{3}$ and ${CHCl}_{3}$, identify the molecule $(X)$ with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule $(X)$ is :
Options
A.2
B.0
C.1
D.3
Solution
Molecule/Dipole moment
$H_{2}\text{ }S$ /0.95
$H_{2}O$ /1.85
${NF}_{3}$/0.23 (minimum)
${NH}_{3}$/1.47
${CHCl}_{3}$ /1.04
Number of lone pair on central atom $= 1$
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