Explanation:
There are certain metals that are less reactive compared to standard hydrogen electrode.
So, such metals do not release hydrogen gas in a reaction with dilute acids.
Examples of such metals are:
copper,silver,gold,platinum,mercury.
Answer:
A burning match stick is brought
near the mouth of the test tube, but no sound is
heard. That means hydrogen gas is not released in this reaction and the metal may be a less reactive metal and it is one among the above list of metals.
