In which of the following options does the order of arrangement not agree with the variation of property indicated against it?

  • A
    $Al^{3+} < Mg^{2+} < Na^{+} < F^{-}$ (increasing ionic size)
  • B
    $B < C < O < N$ (increasing first ionisation enthalpy)
  • C
    $I < Br < Cl < F$ (increasing electron gain enthalpy)
  • D
    $Li < Na < K < Rb$ (increasing metallic radius)

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Identify the incorrect statement from the following:

Given below are two statements:
Statement $I$ : The correct order of first ionization enthalpy values of $Li, Na, F$ and $Cl$ is $Na < Li < Cl < F$.
Statement $II$ : The correct order of negative electron gain enthalpy values of $Li, Na, F$ and $Cl$ is $Na < Li < F < Cl$.
In the light of the above statements,choose the correct answer from the options given below :

State whether the following statements are true or false:
$(i)$ Higher the ionization enthalpy,lower the screening effect.
$(ii)$ The ionization enthalpy of $Be$ is higher than that of $B$.
$(iii)$ The shielding effect increases as we move from left to right in a period.
$(iv)$ The increasing order of the first ionization energy is $B < Be < O < N$.

Choose the incorrect order.

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In which of the following sets,elements are not correctly arranged with the property shown in brackets?

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