JEE · NEET Previous Year Question
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.
choose the most appropriate answer from the options given below
Topic: JEE PYQ
Answer: B. Full step-by-step solution below.
- AStatement I is incorrect but statement II is correct.
- BBoth the statements I and II are correct
- CStatement I is correct but statement II is incorrect
- DBoth the statements I and II are incorrect
Correct answer: B
Solution
(b) The first ionization energies (as in NCERT) are as follows:B: 801 kJ/mol
Al: 577 kJ/mol
Ga: 579 kJ/mol
Ga : [Ar]
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