JEE Mains · Chemistry · STD 11 -p-Block elements - I
Given below are two statements: Statement \(I\) : The decrease in first ionization enthalpy from \(B\) to \(Al\) is much larger than that from \(Al\) to \(Ga\). Statement \(II\) : The d orbitals in Ga are completely filled. In the light of the above statements, choose the most appropriate answer from the options given below
- A Statement \(I\) is incorrect but statement \(II\) is correct.
- B Both the statements \(I\) and \(II\) are correct
- C Statement \(I\) is correct but statement \(II\) is incorrect
- D Both the statements \(I\) and \(II\) are incorrect
Answer & Solution
Correct Answer
(B) Both the statements \(I\) and \(II\) are correct
Step-by-step Solution
Detailed explanation
The first ionization energies (as in NCERT) are as follows: \(B\) : \(801\,kJ / mol\) \(Al : 577\,kJ / mol\) Ga : \(579\,kJ / mol\) \(Ga :[ Ar ] 3 d ^{10} 4 s ^2 4 p ^1\)
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