In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical? (A)…
Classification of Elements & Periodicity · Class 11 · JEE Main Previous Year Question
In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?
(A) Rb and Cs (B) Na and K (C) Ar and Kr (D) I and At
- a
A & B only
- b
B & C only
- c✓
A & C only
- d
C & D only
A & C only
Direct from NCERT data.
Conclusion: Only pairs (A) and (C) have nearly the same or identical electron gain enthalpies. Therefore, the correct choice is Option C.
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Classification of Elements & Periodicity) inside The Crucible, our adaptive practice platform.
More JEE Main Classification of Elements & Periodicity PYQs
The property/properties that show irregularity in first four elements of group-17 is/are: (A) Covalent radius (B) Electron affinity (C) Ionic radius (D) First ionization energy Choose the correct…
Electronic configuration of four elements A, B, C and D are given below: (A) 1s2 2s2 2p3 (B) 1s2 2s2 2p4 (C) 1s2 2s2 2p5 (D) 1s2 2s2 2p2 Which of the following is the correct order of increasing…
The atomic number of the element from the following with lowest 1st ionisation enthalpy is:
The correct order of the first ionization enthalpy is:
The element having the highest first ionization enthalpy among Si, Al, N and C is: