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Compounds of Pnictogens-Trends

Why does nitr...

Question

Why does nitrogen show catenation properties less than phosphorus?

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Solution

The single N--N bond is weaker than the single P--P bond due to high interelectronic repulsion of the non-bonding electrons in $N_{2}$ , owing to small bond length. Therefore, the catenation property is weaker in nitrogen as compared to phosphorus.

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Q. Why does nitrogen show catenation properties less than phosphorus?

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Q. What results in the weak catenation property of nitrogen?

Q. (a) Draw the structures of the following molecules:
(i)

H_{3} P O_{2}

C l F_{3}

(b) Explain the following observations:
(i) Nitrogen is much less reactive than phosphorus.
(ii) Despite having greater polarity, hydrogen fluoride boils at a lower temperature than water.
(iii) Sulphur has a greater tendency for catenation than oxygen in the same group.

Q. Account for the following:
(i) Helium is used in diving apparatus.
(ii) Flourine does not exhibit positive oxidation state.
(iii) Oxygen shows catenation behaviour less than sulphur.

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