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- Need explanation for: - Classification of Elements and Periodic table - JEE Main
- #Chemistry
- #Joint Entrance Examination Main
- #Engineering
- #Classification of Elements and Periodic table
The decreasing values of bond angles from (106°) to
(101°) down group-15 of the periodic table is due to
- Option 1)
increasing bond-bond pair repulsion
- Option 2)
increasing
-orbital character in
- Option 3)
decreasing lone pair-bond pair repulsion
- Option 4)
decreasing electronegativity.
Answers (1)
As we learnt in
Electronegativity -
A qualitative measure of the ability of an atom in a chemical compound to attract shared electron is electronegativity.
- wherein
It is not a measurable quantity.
Because of increased bond length of Sb-H bond as compared to N-H bond, the repulsion between lone pair - bond pair electron decreases, resulting in lesser bond angle.
Option 1)
increasing bond-bond pair repulsion
This option is incorrect.
Option 2)
increasing -orbital character in
This option is incorrect.
Option 3)
decreasing lone pair-bond pair repulsion
This option is correct.
Option 4)
decreasing electronegativity.
This option is incorrect.
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