Chemistry
Assertion (A): Hydrogen shows a dual nature.
Reason (R): Hydrogen resembles both the alkali metals of group 1A and the halogens of group VIIA.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Hydrogen
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Hydrogen shows a dual nature. Hydrogen resembles the alkali metals of Group IA and the halogens of Group VIIA. This is due to the fact that it has only one electron in its valence shell, hence it behaves like the alkali metals which have one valence electron. At the same, it also behaves like halogens as it has just one electron less than the nearest inert gas. Hence both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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