Question:
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
Solution:
Option (iii) Li > Na > K > Rb is the answer.
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
Option (iii) Li > Na > K > Rb is the answer.