How many bonds are there in from Chemistry Chemical Bonding and

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 Multiple Choice QuestionsMultiple Choice Questions

631.

Which one ofthe following compounds has sp2 hybridisation ?

  • CO2

  • SO2

  • N2O

  • CO


632.

Number of lone pair (s) in XeOF4 is/are

  • 0

  • 2

  • 1

  • 3


633.

BCl3 is a planar molecule, while NCl3 is pyramidal, because

  • N-Cl bond is more covalent than B-Cl bond

  • nitrogen atom is smaller than boron atom

  • B-Cl bond is more polar than NCl bond

  • BCl3 has no lone pair of electrons but NCl3 has a lone pair of electrons.


634.

The correct sequence of hybridisation of methane, ethene and acetylene is :

  • sp, sp2, sp3

  • sp2, sp3, sp

  • sp3, sp2, sp

  • sp3, sp, sp2


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635.

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

  • N2+

  • CN-

  • CO

  • NO+


636.

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

  • N2

  • C2

  • Be2

  • O2


637.

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


638.

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.


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639.

How many bonds are there in

  • 18σ, 8π

  • 19σ, 4π

  • 14σ, 2π

  • 14σ, 8π


B.

19σ, 4π

The given molecule consists of 19σ bonds and 4π bonds,


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