Question

explain the reactions of various metals with acids with suitable equations

Answer 1

acid +metal → salt + hydrogen 

nitric acid + calcium = calcium nitrate + hydrogen

Hydrochloric acid + sodium = sodium chloride + hydrogen

sulphuric acid + potassium = potassium sulphate + hydrogen

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Answer 2

When an acid reacts with metal, a salt and hydrogen are produced: acid + metal → salt + hydrogen An example: nitric acid + calcium → calcium nitrate + hydrogen The salt that is produced depends upon which acid and which metal react.