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AP EAMCET · Chemistry · Chemical Bonding and Molecular Structure

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

  1. A \(\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{PCl}_3>\mathrm{BF}_3\)
  2. B \(\mathrm{BF}_3>\mathrm{PCl}_3>\mathrm{NH}_3>\mathrm{NF}_3\)
  3. C \(\mathrm{BF}_3>\mathrm{NH}_3>\mathrm{PCl}_3>\mathrm{NF}_3\)
  4. D \(\mathrm{BF}_3>\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{PCl}_3\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\mathrm{BF}_3>\mathrm{NH}_3>\mathrm{NF}_3>\mathrm{PCl}_3\)

Step-by-step Solution

Detailed explanation

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).
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