Consider the following.... | JEE Main 2026 21 Jan Shift 2 |

JEE MAIN 2026

26-1-2026 S2

Question

Consider the following data:
$\Delta_f \mathrm{H}^{!} \quad($ Methane, g$)=-\mathrm{XkJ} \mathrm{mol}^{-1}$
Enthalpy of sublimation of graphite $=\mathrm{Y} \mathrm{kJ} \mathrm{mol}^{-1}$
Dissociation enthalpy of $\mathrm{H}_2=\mathrm{Z} \mathrm{kJ} \mathrm{mol}^{-1}$
The bond enthalpy of $\mathrm{C}-\mathrm{H}$ bond is given by:

Select the correct option:

\$\frac{X+Y+2 Z}{4}$

$\frac{X+Y+4 Z}{2}$

$X+Y+Z$

$\frac{-X+Y+Z}{4}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution