Question:
Why does H+ ion always get associated with other atoms or molecules?
(i) Ionisation enthalpy of hydrogen resembles that of alkali metals.
(ii) Its reactivity is similar to halogens.
(iii) It resembles both alkali metals and halogens.
(iv) Loss of an electron from hydrogen atom results in a nucleus of very
small size as compared to other atoms or ions. Due to the small size, it cannot
exist free.
Solution:
Option (iv) Loss of an electron from hydrogen atom results in a nucleus of very is the answer.