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Chemical Bonding and Molecular Structure question

2022 · Q120
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Chemical Bonding and Molecular Structure question

2022 · Q120

NEETChemistryChemical Bonding and Molecular StructureMCQ+4 / −1

The correct order of bond angles in the following compounds/species is :

  1. A
    CO2 < NH3 < H2O < NH4+\mathop {\mathrm{N{H_4}}}\limits^ +NH4​+​
  2. B
    H2O < NH3 < NH4+\mathop {\mathrm{N{H_4}}}\limits^ +NH4​+​ < CO2
  3. C
    H2O < NH4+\mathop {\mathrm{N{H_4}}}\limits^ +NH4​+​ < NH3 < CO2
  4. D
    H2O < NH4+\mathop {\mathrm{N{H_4}}}\limits^ +NH4​+​ = NH3 < CO2
View written solutionFree

Correct answer: B

CO2 $\Rightarrow$ sp2 hybridisation, bond angle = 180$^\circ$

NH$_4^ + $ $\Rightarrow$ sp3 hybridisation, bond angle = 109$^\circ$ 28'

NH3 $\Rightarrow$ sp3 hybridisation with one lone pair on central atom, bond angle $ \simeq $ 107$^\circ$

H2O $\Rightarrow$ sp3 hybridisation with two lone pairs on central atom, bond angle $\simeq$ 104.5$^\circ$

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