Which among the following represents the correct order of variation of bond angles in the given molecules?

Which among the following represents the correct order of variation of bond angles in the given molecules?
  1. \(\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{PCl}_3>\mathrm{BF}_3\)
  2. \(\mathrm{BF}_3>\mathrm{PCl}_3>\mathrm{NH}_3>\mathrm{NF}_3\)
  3. \(\mathrm{BF}_3>\mathrm{NH}_3>\mathrm{PCl}_3>\mathrm{NF}_3\)
  4. \(\mathrm{BF}_3>\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{PCl}_3\)

Solution

Bond angle in \(\mathrm{BF}_3\left(120^{\circ}\right), \mathrm{NH}_3\left(107^{\circ}\right), \mathrm{NF}_3\left(102^{\circ}\right)\) and \(\mathrm{PCl}_3\left(100^{\circ}\right)\). \(\mathrm{BF}_3\) is trigonal planar, hence
Hence, the correct option is (d).

Asked in: AP EAMCET 2020 (21 Sep Shift 2)

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