Which gas is usually liberated when an acid reacts with a metal?
[question] Question. Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas ? [/question] [solution] solution: Hydrogen gas is usually liberated when an acid reacts with a metal. Example, Step 1- Take few pieces of zinc granules and add $5 \mathrm{ml}$ of dilute $\mathrm{H}_{2} \mathrm{SO}_{4}$. Step 2 - Shake it and pass the gas produced into a soap solution. The bubbles are formed in the soap solution. These s...
Why should curd and sour substances
[question] Question. Why should curd and sour substances not be kept in brass and copper vessels? [/question] [solution] solution: Curd and other sour substances contain acids. Therefore, when they are kept in brass and copper vessels, the metal reacts with the acid to liberate hydrogen gas and harmful products, thereby spoiling the food. [/solution]...