Assertion : Bond lengths of P-Cl bonds in gaseous PCl5 and solid

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 Multiple Choice QuestionsMultiple Choice Questions

901.

The bond order of O2+ is the same as in:

  • N2+

  • CN-

  • CO

  • NO+


902.

Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory?

  • N2

  • C2

  • Be2

  • O2


903.

The manganate and permanganate ions are tetrahedral, due to :

  • There is no π-bonding

  • The π- bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese.

  • The π-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese

  • The π-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese


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904.

Assertion : Bond lengths of P-Cl bonds in gaseous PCl5 and solid PCl5 are not equal.

Reason : Because in solid state two PCl5 molecules are associated.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


A.

If both assertion and reason are true and reason is the correct explanation of assertion.

As in solid state, PCl5 exists as an ionic solid [PCl4]+[PCl6]- in which the cation, [PCl4]+ is tetrahedral and the anion, [PCl6]- is octahedral. PCl5 in gaseous state has trigonal bipyramidal structure in which three equatorial bonds are equivalent, while the two axial bonds arc longer than equatorial bonds due to more bond pair repulsion.


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905.

How many bonds are there in

  • 18σ, 8π

  • 19σ, 4π

  • 14σ, 2π

  • 14σ, 8π


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