JEE MAIN - Chemistry (2022 - 30th June Morning Shift - No. 5)
The correct order of electron gain enthalpy ($$-$$ ve value) is :
O > S > Se > Te
O < S < Se < Te
O < S > Se > Te
O < S > Se < Te
Explanation
Down the group, the size of atom increases, so electron gain enthalpy decreases.
In case of Oxygen, due to its small size, which leads to electronelectron repulsion, results in less electron gain enthalpy than sulphur.
In case of Oxygen, due to its small size, which leads to electronelectron repulsion, results in less electron gain enthalpy than sulphur.
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