Question

Which of the following reaction is irreversible in nature?

• A. $N{H}_{4}Cl\left(s\right)\leftrightharpoons N{H}_3\left(g\right)+HCl\left(g\right)$
• B. $N_2\left(g\right)+3H_2\left(g\right)\leftrightharpoons 2N{H}_3\left(g\right)$
• C. $C{H}_4\left(g\right)+2O_2\left(g\right)\to C{O}_2\left(g\right)+2H_{2}O\left(l\right)$
• D. $2S{O}_2\left(g\right)+O_2\left(g\right)\leftrightharpoons 2S{O}_3\left(g\right)$

Answer 1

The correct option is C

$C{H}_4\left(g\right)+2O_2\left(g\right)\to C{O}_2\left(g\right)+2H_{2}O\left(l\right)$

In a reversible reaction, the reactants can be obtained back from the products. The arrow used in the representation of a reversible reactions is '$\leftrightharpoons$'. Examples of a reversible reaction are:

$N{H}_{4}Cl\left(s\right)\leftrightharpoons N{H}_3\left(g\right)+HCl\left(g\right)$

$N_2\left(g\right)+3H_2\left(g\right)\leftrightharpoons 2N{H}_3\left(g\right)$

$2S{O}_2\left(g\right)+O_2\left(g\right)\leftrightharpoons 2S{O}_3\left(g\right)$

In an irreversible reaction, the reactants cannot be obtained back from the products. The arrow used in the representation of an irreversible reactions is '$\to$'. Example of an ireversible reaction is:

$C{H}_4\left(g\right)+2O_2\left(g\right)\to C{O}_2\left(g\right)+2H_{2}O\left(l\right)$