MCQ
The correct order of electron gain enthalpy is
- A$S > Se > Te > O$
- B$Te > Se > S > O$
- C$O > S > Se > Te$
- D$S > O > Se > Te$
$\Rightarrow S > Se > Te > O$
(Oxygen shows least electron gain enthalpy due to small size of atom)
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$(i)\, [Co(en)_2(Ox)]^+$
$(ii)\, [Fe(Trien)(Ox)]^+$
$(iii)\, [Ca(EDTA)]^{-2}$
$(iv)\, [Pt(Ox)_2 (H_2O)_2]$
Reason : The order of a reaction cannot be written from balanced equation of a reaction.