Among $H_{2} ext{ }S,H_{2}O,{NF}_{3},{NH}_{3}$ and ${CHCl}_{3}$, identify the molecule $(X)$ with l

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Among $H_{2}	ext{ }S,H_{2}O,{NF}_{3},{NH}_{3}$ 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 :

Accepted Answer

Molecule/Dipole moment$H_{2}	ext{ }S$ /0.95$H_{2}O$ /1.85${NF}_{3}$/0.23 (minimum)${NH}_{3}$/1.47${CHCl}_{3}$ /1.04Number of lone pair on central atom $= 1$

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