Which of the following has least bond energy? from Chemistry Che

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 Multiple Choice QuestionsMultiple Choice Questions

81.

Geometry of SiO44- anion is

  • tetrahedral

  • trigonal

  • trihedral

  • pentagonal


82.

Chlorine (Cl17) free radical contains how many electrons around the nucleus?

  • 16

  • 17

  • 18

  • 19


83.

The atomic number of Sn is 50. The shape of gaseous SnCl2 molecule is

  • Cl-Sn-Cl


84.

The central carbon atom of a free radical contains

  • 6 electrons

  • 7 electrons

  • 8 electrons

  • 10 electrons


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85.

Reaction for the formation of NaCl is

  • Na(g) + Cl2(g) → NaCl(s)

  • Na(s) + 12Cl2(g) → NaCl(s)

  • Na(g) + 12Cl2(g) → NaCl(s)

  • Na(g) + Cl2(g) → NaCl(g)


86.

The hybridization state of C atom in butendioic acid is

  • sp2

  • sp3

  • Both (a) and (b)

  • sp


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87.

Which of the following has least bond energy?

  • N22-

  • N2-

  • N2+

  • N2


D.

N2

i. N22- - KK' σ2s2, σ*2s2, σ2pz2π2px2 ≈ π2py2π*2px1

 Bond Order = Nb - Na2 = 8 - 42 = 2

ii. N2- - KK' σ2s2, σ*2s2, σ2pz2π2px2 ≈ π2py2π*2px1

Bond Order = 8 - 32 = 2.5

iii. N2+ - KK' σ2s2, σ*2s2, σ2px2  π2py2, π*2pz1

Bond Order = 7 - 22 = 3

iv. N2 - KK' σ2s2, σ*2s2π2px2  π2py2 , σ2pz2

Bond Order = 8 - 22 = 3

 Bond energy  1Bond Order

Therefore, N2 has least bond energy.


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88.

Which of the following species has highest bond energy?

  • O22-

  • O2+

  • O2-

  • O2


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89.

Which of the following is least hydrolysed?

  • BeCl2

  • MgCl2

  • CaCl2

  • BaCl2


90.

The geometry of I3- is

  • triangular

  • linear

  • tetrahedral

  • T-shape


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