When comparing anions from the same group, larger size of a in the h-a bond increases / decreases (circle the correct answer) acid strength.

increases

Explanation:

The acid strength of any species depends on the stability of its conjugate base ,

The conjugate base is formed via the removal of the hydrogen ion .

Hence , more stable the conjugate base , more acidic would be the compound .

The conjugate base have a negative charge ,

Hence , larger the anion or the conjugate base , more stable it would be , because the negative charge will get dispersed on the larger species , hence will become stabilized .

Therefore ,

Larger the size of anion or the conjugate base , more stable would be the anion and more acidic would be the compound .