Q. Assertion (A) Higher order ionisation constant are smaller than the lower order ionisation constant of a polyprotic acid.
Reason (R) It is more difficult to remove a positively charged proton from a negative ion due to Coulombic forces.

 1352  170 Equilibrium Report Error

Solution:

Higher order ionisation constants are smaller than the lower order ionisation constant of a polyprotic acid. The reason for this is that, it is more difficult to remove a positively charged proton from a negative ion due to electrostatic forces.
This can be seen in the case of removing a proton from the uncharged as compared from a negatively charged .
Thus, is correct but is incorrect.