Question

Hydrogen is a gas that burns with a ‘pop’ sound.
A.) True
B.) False

Answer 1

Hint: We know that hydrogen gas burns. And sound comes when an explosion takes place. Hydrogen burns means it goes under some chemical reaction.
Step by step solution:
We know that hydrogen is the chemical element with the symbol ‘H’ and with atomic number 1 and its atomic mass is 1.008. Hydrogen is the lightest element in the periodic table and it is the most abundant chemical substance in the universe.
When we say that hydrogen is burning, it is actually undergoing a chemical reaction. In this chemical reaction hydrogen combines with oxygen to form water and releases a lot of energy. Here is the chemical reaction of hydrogen burning:
\[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O+energy\]
A lot of energy is released by hydrogen when it combusts. And most of the energy is released in the form of heat.
And this heat causes gases to expand. A lot of heat is released into the gaseous mixture and the air adjacent to it expands very quickly. And this gaseous mixture contains hydrogen, oxygen and water vapor liberated from the reaction. This quick expandation of gas molecules causes a break of the sound barrier. And because of this explosion we hear the pop sound of hydrogen burning.
So, from the above explanation we can conclude that the given statement is true.
The correct answer is “A”.

Note: Do not confuse nuclear fusion which is a physical reaction, not a chemical reaction. Other common gases, such as water vapor, nitrogen, and carbon dioxide will not burn with oxygen, so they will not give any sound.