The order of decreasing ionisation enthalpy in alkali metals is
(i) Na > Li > K > Rb
(ii) Rb < Na < K < Li
(iii) Li > Na > K > Rb
(iv) K < Li < Na < Rb
The order of decreasing ionisation enthalpy in alkali metals is
(i) Na > Li > K > Rb
(ii) Rb < Na < K < Li
(iii) Li > Na > K > Rb
(iv) K < Li < Na < Rb
This is a multiple choice type question as classified in NCERT Exemplar
Correct Option (iii)On moving down the group as the size increases, the nuclear charge attraction decreases. The effect of increasing size outweighs the increasing nuclear charge. Thus, ionization enthalpy decreases. The order of
Upvote 
Similar Questions for you
Li+ has the highest hydration enthalpy.
Hence it is most hydrated
Therefore, Correct order of hydrated radii is Cs+ < Rb+ < K+ < Na+ < Li+
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else.
On Shiksha, get access to
Learn more about...
Chemistry NCERT Exemplar Solutions Class 11th Chapter Ten 2025
View Exam DetailsMost viewed information
SummaryDidn't find the answer you were looking for?
Search from Shiksha's 1 lakh+ Topics
Ask Current Students, Alumni & our Experts
Have a question related to your career & education?
See what others like you are asking & answering