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Question
The correct order of magnitude of electron gain enthalpy of O, S and Se is:
The correct order of magnitude of electron gain enthalpy of O, S and Se is:
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Solution
The correct option is B S > O > Se
As we move down a group, EGE becomes less negative. This is because, the size of the atom increases and the added electron would be at a larger distance from the nucleus. But oxygen has a less electron gain enthalpy than sulphur because of its smaller size.
As we move down a group, EGE becomes less negative. This is because, the size of the atom increases and the added electron would be at a larger distance from the nucleus. But oxygen has a less electron gain enthalpy than sulphur because of its smaller size.
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