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

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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.

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detailed solution

Correct option is 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.

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