When a piece of metal is dropped in cold water, the water slowly becomes turbid and effervescence is observed. What will you observe, if blue litmus paper is dipped into the turbid water ? Indentify the metal and justify the observation.

Explanation

(i) Indentification of metal that reacts with cold water but does not produce any flame.
(ii) reaction between the metal and water.
(iii) product formed in the above reaction.
(iv) solubility of the product in water
(v) nature of aqueous solution formed
(vi) identification of changes observed when blue litmus paper is dipped in the above solution.