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| 1. |
What do you understand by inert pair effect ? |
| Answer» Solution : Inert pair effect: As one MOVES down the group, the tendency of s-block electrons to participate in CHEMICAL bonding decreases. This effect is known as inert pair effect. In case of group 13 elements, the electronic CONFIGURATION is `ns^2 np^1` and their group valency is +3. However, on moving down the group, the +1 oxidation state becomes more stable. This happens because of the poor shielding of the `ns^2` electrons by the d and f-electrons. As a result of the poor shielding, the `ns^2` electrons are held tightly by the NUCLEUS and so, they cannot participate chemical bonding. | |