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The shape of \$PC{{l}_{3}}\$ molecule is:A. trigonal bipyramidB. tetrahedralC. pyramidalD. square planar

Last updated date: 11th Sep 2024
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Hint: \$PC{{l}_{3}}\$ is called phosphorus trichloride, which is formed from phosphorus and chlorine. It is actually a very toxic liquid which when reacted with water releases HCl gas. The hybridisation in \$PC{{l}_{3}}\$is \$s{{p}^{3}}\$.

Step by step solution:
- Now let’s write the electronic configuration of phosphorus,
The atomic number of phosphorus is 15, so we can write electronic configuration as –
\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{3}}\]
- Here, if we have to find the hybridisation, then it is equal to the sum of the number of sigma bonds and the number of lone pairs.
- Here, we can see that all bonds are of (P-Cl) type, we can see from the diagram drawn below that there are three P-Cl single bonds present, so the number of sigma bonds will be 3.
- And we can see here that there are 5 electrons present in valence shell that is \$3{{s}^{2}}3{{p}^{3}}\$, so ; two electrons are not participating in pairing , therefore the number of lone pairs will be equal to 1.
- So, we can say that hybridisation in \$PC{{l}_{3}}\$is \$s{{p}^{3}}\$.
- Structure of \$PC{{l}_{3}}\$ is:

- Hence, from the structure and hybridisation of \$PC{{l}_{3}}\$ ,we can say that the geometry is pyramidal.