Why does H⁺ ion always get associated with other atoms or molecules?

• A

  Ionisation enthalpy of hydrogen resembles that of alkali metals.

• B

  Its reactivity is similar to halogens.

• C

  It resembles both alkali metals and halogens.

• D

  Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to small size it cannot exist free.