Question 2

Why does $H^{+}$ ion always get associated with other atom 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 compare to other or ions. Due to small size it cannot exist free.

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Solution

(D)

$H^{+}$ ion always get associated with other atoms or molecules. The reason is that loss of an elctron 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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Similar questions

Q. Why does

H^{+}

ion always get associated with other atoms or molecules?

Q. Hydrogen is similar to alkali metals in that it has a ionisation enthalpy.

Q. Assertion (A): Hydrogen shows resemblance with alkali metals as well as halogens.
Reason (R): Hydrogen exists in atomic form only at high temperature.

Assertion (A): Hydrogen resembles alkali metals.
Reason (R): Hydrogen exists in atomic form at extreme temperatures (~5000K).
Choose the most appropriate of the following:

Q. Assertion :Hydrogen resembles both, alkali metals as well as halogens. Reason: Hydrogen forms oxides, halides and sulphides, and exists as diatomic molecule.

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(D) H+ ion always get associated with other atoms or molecules. The reason is that loss of an elctron 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.

(D)

$H^{+}$ ion always get associated with other atoms or molecules. The reason is that loss of an elctron 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.