Question

State the external indication seen during addition of dilute acid to an active metal.
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Answer 1

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Acid to an active metal : Gas is evolved, test tube or flask becomes hot (heat is produced). Addition of dil. hydrochloric acid to silver nitrate : A white coloured precipitate of AgCl is seen. Addition of water to quick lime : Hissing sound accompanied by a lot of heat (boiling)♥

Answer 2

Answer:

Acid to an active metal: Gas is evolved, test tube or flask become hot Addition to dil. Hydrochloric acid to silver nitrate: A white coloured precipitate AgCI is seen.