Hydrogen is placed in I A group not in 7 A group of the periodic table give reason.

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Solution

Hydrogen is placed in IA group not in 7A group of the periodic table because,
Hydrogen has an electronic configuration that is similar to group 1 elements which is 1s².
It readily loses its electron and forms H⁺ ion which is the same as the electropositive character of group 1 elements.
Its oxidation state is the same as group IA elements and not as group 7A.
Hydrogen acts as a strong reducing agent like the alkali metals.

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