JEE Main 20244 AprilEvening Shift
- Exam
- JEE Main
- Year
- 2024
- Date
- 4 April
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Classification of Elements and Periodicity in Properties
JEE Main 2024 · 4 April · Evening Shift · Chemistry · Classification of Elements and Periodicity in Properties
The correct order of the first ionization enthalpy is
The correct order of the first ionization enthalpy is
Options
- A(\mathrm{Al} > \mathrm{Ga} > \mathrm{Tl})
- B(\mathrm{Ga} > \mathrm{Al} > \mathrm{B})
- C(\mathrm{Tl} > \mathrm{Ga} > \mathrm{Al})
- D(\mathrm{B} > \mathrm{Al} > \mathrm{Ga})
Correct answer
C. (\mathrm{Tl} > \mathrm{Ga} > \mathrm{Al})
Step-by-step solution
(i) due to lanthanide contraction has more I.E. as compared to and
(ii) due to scandide contraction Ga has more I.E. as compared to