Question

Write two similarities of hydrogen each with halogen and with alkali metals. Why hydrogen is placed in the activity series of metals?​

Answer 1

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Explanation: There are following similarities of hydrogen with alkali metals

1. Oxidation State: Hydrogen exhibits oxidation state of +1 ion the compounds of hydrogen which is similar to alkali metals.
2. Valency: Valency of hydrogen is 1 like alkali metals.
3. Reaction with Non-metals: Like alkali metals, hydrogen dorms binary compounds with non-metal.
4. Reducing nature: Hydrogen is a good reducing agent like alkali metals.

Though hydrogen is a non - metal it has been placed in activity series. Because like metals hydrogen also lose its electron and form positive ion i.e H+ ion.