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प्रश्न
Give reasons for the following:
N-N bond is weaker than P-P bond.
टीपा लिहा
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उत्तर
The nitrogen atom is smaller in size than the Phosphorus atom. The bond length of the N-N bond is smaller than that of the P-P bond. Due to this, the four non-bonding electrons of the two nitrogen atoms repel each other making the bond weaker.
This does not happen in the case of phosphorus because P-P bond length is more. So, the repulsion of non-bonding electrons is lesser than in N-N. So, the P-P sigma bond is stronger.
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