In which of the following molecules/ions BF3, NO2-,NH2- and H20, the central atom is sp2 hybridised?

Q. In which of the following molecules/ions BF3, NO2-,NH2- and H20, the central atom is sp2 hybridised?

  1. NO2- and NH2
  2. NH2- and H20 
  3. NO2- and H20
  4. BF3 and NO2-

Answer: BF3 and NO2-

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