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Question
The correct order of electron gain enthalpy (−ve value) is ______.
Options
O > S > Se > Te
O < S < Se < Te
O < S > Se > Te
O < S > Se < Te
MCQ
Fill in the Blanks
Solution
The correct order of electron gain enthalpy (−ve value) is O < S > Se > Te.
Explanation:
As atom size decreases down the group, so does the electron gain enthalpy. Because of its small size, which causes electron-electron repulsion, oxygen has a lower electron gain enthalpy than sulphur.
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