Which of the following gases evolved in a metal acid reaction?

Correct option is D

Sol. The correct answer is (d) Hydrogen.
· When a metal reacts with an acid (such as hydrochloric acid or sulfuric acid), one of the products is hydrogen gas (2). The metal displaces hydrogen from the acid, forming a metal salt and hydrogen gas as a result of the reaction.
· Metal (M)+ Acid →Salt of Metal (M2+)+Hydrogen Gas (H2)
Details on other options:
· No Gas Evolved:In some cases, particularly with less reactive metals or weak acids, no gas may be evolved. For example, copper (Cu) reacts very slowly with dilute sulfuric acid and may not produce hydrogen gas in noticeable amounts.
· Depends on the Acid:The specific acid used can influence the reaction. For instance, some metals might react differently with different acids. For example, zinc reacts vigorously with hydrochloric acid to produce hydrogen gas, but it reacts more slowly with sulfuric acid.
· Oxygen (in rare cases):In rare cases involving certain metals and strong oxidizing acids, oxygen gas (O2) can be evolved. However, this is less common and typically not observed in typical metal-acid reactions.