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# $A{{l}_{4}}{{C}_{3}}$ on hydrolysis gives X gas. How many H atoms are present in an X molecule?

Last updated date: 18th May 2024
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Hint: To solve this question we should know that hydrolysis is any chemical reaction in which a molecule of water ruptures one or more chemical bonds. We should know that aluminium carbide is a quite hard substance and is often used as an abrasive material.

We should know that $A{{l}_{4}}{{C}_{3}}$ is carbide of aluminium. It has the appearance of pale yellow to brown crystals. It is stable up to$1400^oC$ . It decomposes in water with the production of methane.
Decomposition reaction of Aluminium carbide is as follows:
Aluminium carbide hydrolyses with the evolution of methane. The reaction proceeds at room temperature but is rapidly accelerated by heating.
$A{{l}_{4}}{{C}_{3}}+12{{H}_{2}}O\to 4Al{{\left( OH \right)}_{3}}+3C{{H}_{4}}\uparrow$
So, the “X” molecule is methane. And the number of hydrogen atoms present in X molecule or methane is 4. So, our correct answer is 4.
$4Al\text{ }+\text{ }3C\to A{{l}_{4}}{{C}_{3}}$
$2\text{ }A{{l}_{2}}{{O}_{3}}+9\text{ }C\text{ }\to \text{ }A{{l}_{4}}{{C}_{3}}+6CO$
$4Al+3\text{ }SiC\to \text{ }A{{l}_{4}}{{C}_{3}}+3Si$