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Nitrogen forms N(2) but phosphorous when...

Nitrogen forms `N_(2)` but phosphorous when forms `P_(2)` gets readily converted into `P_(4)` because

A

`p pi - p pi` bonding is strong in phosphorus

B

`p pi - p pi` bonding is weak in phosphorus

C

triple bond is present in phosphorus

D

single P - P bond is weaker than N -N bond.

Text Solution

Verified by Experts

The correct Answer is:
B
`p pi - p pi` bonding in nitrogen is strong hence it can form triple bond with another N. Single N - N bond is weaker than P - P bond due to high interionic repulsion of non-bonding electrons. Hence, `N equiv N` is stable and P 2 is not.
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NCERT FINGERTIPS ENGLISH-THE P-BLOCK ELEMENTS -Assertion And Reason
  1. Nitrogen forms N(2) but phosphorous when forms P(2) gets readily conve...

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  2. Assertion : The covalence of nitrogen in N(2)O(5) is 5 Reason : Nitr...

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  3. Assertion : Catenation tendency is weaker in nitrogen. Reason : Nitr...

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  4. Assertion: Ammonia acts as a ligand. Reason : A lone pair of electro...

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  5. Assertion : White phosphorus is more reactive than red phosphorus. R...

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  6. Assertion : In trigonal bipyramidal structure two axial bonds are long...

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  7. Assertion : Acidic character of group 16 hydrides increases from H(2)O...

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  8. Assertion : Ozone layer in the upper region of atmosphere protects ear...

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  9. Assertion : O(3) acts as a powerful oxidising agent. Reason : O(3) o...

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  10. Assertion: In vapour state sulphur is paramagnetic in nature. Reason...

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  11. Assertion : Sulphuric acid reacts with sodium chloride in the followin...

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  12. Assertion : Fluorine combines with sulphur to form SF(6) but no other ...

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  13. Assertion : Fluorine oxidises water to oxygen whereas chlorine and bro...

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  14. Assertion: HClO(4) is a stronger acid than HClO(3). Reason: Oxidatio...

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  15. Assertion : Interhalogen compounds are more reactive than halogens (ex...

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  16. Assertion :Solubility of noble gases in water decreases with increases...

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