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Which one atom or ion in the following pairs has higher electron gain enthalpy?(i) O- , S(ii) O- , S-(iii) N- , P |
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Answer» (i) The electron gain enthalpy of O is positive while that of S is negative because of repulsions between the electrons on O- and the additional incoming electron. (ii) Electron gain enthalpy of O is more positive than that of S- due to small size which causes repulsions between O- and the incoming electron is much more than in S- (iii) The electron gain enthalpy of N is positive while that of P is negative because of repulsion between N- and the incoming electron. |
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