InterviewSolution
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InterviewSolution
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In which of the following options order of arrangement does not agree with the variation of property indicated against it ?A) `Al^(3+) lt Mg^(2+) lt Na^(+) lt F^(-)` (increasing ionic size)B)`B lt C lt N lt O` (increasing first ionisation enthalpy)C)`I lt Br lt Cl lt F` (increasing electron gain enthalpy)D)`Li lt Na lt K lt Rb` (increasing metallic radius)A. `B lt C lt N lt O` (increasing first ionisation enthalpy)B. `I lt Br lt CI lt F` (increasing electron gain enthalpy)C. `Li lt Na lt k lt Rb`( increasing metallic radius )D. `Al^(3+) lt Mg^(2+) lt Na^(+) lt F^(-)` (increasing ionic size) |
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Answer» Correct Answer - A::B First ionisation energy is the energy required to remove an electron from outermost shell. Hence , correct order is `B lt C lt O lt N` For option (b) Electron gain enthalpy is the energy required to gain an electron in the outermost shell.ltbegt Hence , the correct order is `I lt Br lt F lt CI` For option (c) As we move down the group in alkali metal , metallic radius increases `Li lt Na lt K lt Rb` For option (d) In case of isoelectronic species increases the ionic size of the species increases and vice-versa `Al lt Mg^(2+) lt Na^(+) lt F^(-)` |
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