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The Formation Of The Oxide Ion (O)^-2(g), From Oxygen Atom Requires First An Exothermic, And Then An Endothermic Step As Shown Below:
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The Strongest Base Of The Following Is
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Which Of The Following Is Not A Periodic Property?
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The Species Ar, K+ And (Ca)^2+ Contain The Same Number Of Electrons. In Which Order Do Their Radii Increase?
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Beryllium Shows Diagonal Relationship With
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Which Of The Following Have The Largest Ionic Size?
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Which Of The Following Represents The Correct Order Of Increasing Electron Gain Enthalpy With Negative Sign For The Elements O, S, F And CI?
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Which Among The Following Has The Highest Ionisation Potential?
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Smallest Among These Species Is
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The Electron Affinity Of Be Is Almost Similar To That Of
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If The Atomic Number Of An Element Is 33, It Will Be Placed In The Periodic Table In The
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The First Ionisation Of Na Is 5.1 EV. The Value Of Electron Gain Enthalpy Of Na+ Will Be
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Ionisation Energy And Election Affinity Are Defined At
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The Only Non-metal Which Is Liquid At Ordinary Temperature Is
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Which Of The Following Element Is Metalloid?
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In The Periodic Table Metals Usually Used As Catalyst Belong To
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The Electronic Configuration (1s)^2, (2s)^2, (2p)^6, (3s)^2, (3p)^6, (3d)^9 Represents A
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An Element With Atomic Number 21 Is A
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The Element Z=114 Has Been Discovered Recently. It Will Belong To Which Of The Following Family/group And Electronic Configuration?
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