In which of the following options the order of arrangement does not ag

1.	In which of the following options the order of arrangement does not agree with the variation of property indicated against it?(a) I < Br < Cl < F (increasing electron gain enthalpy)(b) Li < Na < K < Rb (increasing metallic radius)(c) Al3+ = Mg2+ < Na+ < F- (increasing ionic size)(d) B < C < N < O (increasing first ionisation enthalpy)
Answer» The correct option is : (a) I < Br < CI < F (increasing electron gain enthalpy) (d) B < C < N < O (increasing first ionisation enthalpy) Explanation: The correct order of increasing negative electron gain enthalpy is : I < Br < F < Cl and the correct order of increasing first ionisation enthalpy is B < C < O < N.

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?(a) I < Br < Cl < F (increasing electron gain enthalpy)(b) Li < Na < K < Rb (increasing metallic radius)(c) Al3+ = Mg2+ < Na+ < F- (increasing ionic size)(d) B < C < N < O (increasing first ionisation enthalpy)

Answer»

The correct option is : (a) I < Br < CI < F (increasing electron gain enthalpy)

(d) B < C < N < O (increasing first ionisation enthalpy)

Explanation:

The correct order of increasing negative electron gain enthalpy is : I < Br < F < Cl and the correct order of increasing first ionisation enthalpy is B < C < O < N.

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