Multiple Choice Question Answer XIX — task. Science CBSE, Class 10.

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1. The value of 1st, 2nd, 3rd and 4th ionization energy (IE) of an atom are respectively 7.5 eV, 25.6 eV, 48.6 eV and 170.6 eV. The electronic configuration of the atom will be

\(1s^2\), \(2s^2\), \(2p^6\), \(3s^2\), \(3p^3\)
\(1s^2\), \(2s^2\), \(2p^6\), \(3s^2\), \(3s^2\)
\(1s^2\), \(2s^2\), \(2p^6\), \(3s^1\)
\(1s^2\), \(2s^2\), \(2p^6\), \(3s^2\), \(3p^1\)

2. Electron addition would be easier in

\(O^+{^2}\)
\(O^+\)
\(O^2{^-}\)
\(O\)

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19. Multiple Choice Question Answer XIX

Exercise condition: