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Explain the non-linear shape of H_(2)S and a non-planer shape of PCl_(3) using valence shell elecilron pair repuJsion theory. |
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Answer» Solution :Central atom do this is S. There are 6 electrons in its valence shell `(""_(16)S = 2, 8, 6 )`. From this two electrons are shared with two H-atoms and the remaining four electrons are present as two lone pairs.  So, total pairs of electrons are four (2 bonding pairs and 2 lone pairs). As the presence of 2 lone pairs the shape becomes distorted tetrahedral or angular or BENT(non-linear).  `PCl_(3)` : Central atom is PHOSPHORUS. There are 5 electrons in its valence shell (`""_(15)`P = 2, 8, 5). Three electrons are shared with three 0 -atoms and the remaining two ELECIRONS are present as one lone pair. So, total pairs of electrons are four (1 lone pair and 3 bond pajrs). Due to the presence of one lone pair, the shape becomes pyramidal (non- planar). |
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