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p and p Overl...

p and p Overlap

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Q. The correct order of strengths of back-bonding and lewis acidic strengths in Boron trihalides respectively is:

$B F_{3} < B C l_{3} < B B r_{3}$ and $B F_{3} < B C l_{3} < B B r_{3}$
$B F_{3} > B C l_{3} > B B r_{3}$ and $B F_{3} > B C l_{3} > B B r_{3}$
$B F_{3} > B C l_{3} > B B r_{3}$ and $B F_{3} < B C l_{3} < B B r_{3}$
$B F_{3} < B C l_{3} < B B r_{3}$ and $B F_{3} > B C l_{3} > B B r_{3}$

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Q.

On the basis of molecular orbital theory, pick out a molecule from the following that does not exist:

He₂⁺
O₂
H₂⁺
He₂

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Q.

why is sigma bond stronger than pi-bond??

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Q. Can hybridised orbital form dative( coordinate) bond??

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Q.

Among the following, the overlap that provides the strongest bond and hence more stability is

sp³-sp³
s-p
p-p
s-s

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Q. 24.What is partial charge in covalent or co-ordinate bonding?

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Q. Number of spectral lines in balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom are

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Q. Number of spectral lines in balmer series when an electron return from 7th orbit to 1st orbit of hydrogen atom ar

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Q. If the internuclear axis of a diatomic molecule is

z

, orbitals

p_{x}

of one atom and

p_{y}

of the other overlap with each other to form which of the following bonds?

$π$ bond
$σ$ bond
$δ$ bond
No bond will be formed

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Q. An example of

p π - p π

bonding is:

$B F_{3}$
$C O_{2}$
$N H_{3}$
$C H_{4}$

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Q. The total no of nodes in σ*2pz and π*2px orbitals is a) 0 and 1 b)1 and 1 c)1 and 2 d)2 and 1

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Q. 10. which of following statement are correct A-:The formula n(n-1)/2 is used to determine the total number of spectral lines for H-atom wher electron jumps from any higher orbit to any lower orbit R -:The number of lines in any spectral series is determined by (n2 + n, )

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Q. How to make the hybridization diagram (orbit mixing diagram ) of BrF5

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Q. The molecule(s) having

p π - p π

back bonding among the following is/are:

$B C l_{3}$
$B F_{3}$
$B e C l_{2}$
Both a and b

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Q. If the internuclear axis of a diatomic molecule is

z

, orbitals

p_{z}

of one atom and

p_{y}

of the other overlap with each other to form which of the following bonds?

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