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Maximum p pi-p pi back bonding exists in...

Maximum `p pi-p pi` back bonding exists in

A

Both A and R are correct and R is the correct explanation of A

B

Both A and R are correct and R is not the correct explanation of A

C

A is correct R is wrong

D

A is wrong R is correct

Text Solution

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The correct Answer is:
A
Both A and R are correct and R is the correct explanation for A
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(p pi-p pi) back bonding occurs in the halides of boron but not in those of aluminium. Explain.

Assertion : Both rhombic and monoclinic sulphur exist as S_(8) but oxygen exists as O_(2) . Reason : Oxygen forms p pi- p pi multiple bond due to small size and small length but p pi - p pi bonding is not possible in sulphur.

Assertion : To obtain effefctive p pi-p pi overlap, the size of the de-orbital must be similar to the p- orbital so the chlorine p pi-p pi bonding is strongest in their oxoanions. Reason :On moving period from left to right in the periodic table, the nuclear charge is incresed and more s and p-electrons are added. Since these s- and p- electron shield the nuclear charge incompletely, the size of the atom and that of the d- orbital decreases .This leads to progressively stronger p pi-d pi bonding.

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Which of the following elements form p pi- dpi bonding in its oxide ?

NARAYNA-15TH GROUP ELEMENTS-Level-VI
  1. Match the following:

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  2. Match the following:

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  3. Maximum p pi-p pi back bonding exists in

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  4. Assertion: In PCI(5), all P-CI bonds have same bond lengths. Reason:...

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  5. Assertion: Na(2)HPO(3) is an acidic salt Reason: An acidic salt cont...

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  6. Assertion: PCI(5) in aqueous medium is a better oxidant than NCl(3) ...

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  7. Assertion: In hydrazoic acid oxidation state of nitrogen is -(1)/(3) ...

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  8. Statement -1 : Hydrolysis of NCl(3) gives NH(4)OH and HOCl while PCl(...

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  9. Real gases show deviation from ideal behaviour at low temperature and ...

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  10. Assertion Bond angles of NH(3),PH(3),AsH(3) and SbH(3) decrease in ord...

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  11. Trisilyamine (SiH(3))(3) N is

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  12. Orthophosphoric acid is

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  13. Assertion (A) : Stability of NH(3) is greater than PH(3) Reason (R) ...

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  14. Which of the following oxide/oxy-anions does not contain P-O-P linkage...

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  15. Assertion: Nitric oxide is paramagnetic in the liquid and solid states...

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  16. Conc. HNO(3) can be stored in a container made of

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  17. Assertion: Red phophorus is less volatile then white phosphorus. Rea...

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  18. Assertion : white phosphorus is more reactive than red phosphorus Re...

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  19. Which of the following compounds does not liberate nitrogen gas on tre...

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  20. The true statement among the following are:

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