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NEETChemistryClassification of Elements and Periodicity in Properties

The first ionisation enthalpy values (in kJ mol –1 ) of group 13 elements are - B Al Ga In Tl 801 577 579 558 589 Which of the following options explains this deviation from the general trend?

Options

  1. ADue to the poor shielding effect of d and f electrons
  2. BDue to the presence of 3 electrons in the outermost shell
  3. CDue to high reactivity
  4. DDue to behaviour as Lewis acids

Correct answer

A. Due to the poor shielding effect of d and f electrons

Step-by-step solution

Correct Option is : (A) Due to the poor shielding effect of d and f electrons

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