The given figure shows the potential energy curves for four hydrogen halide molecules as a function of internuclear distance. Match the curves given in List I with the corresponding molecules in List II. List I List II A Curve P I HBr B Curve Q II HF C Curve R III HI D Curve S IV HCl Choose the correct answer from the options given below:

Step-by-step solution

The minimum of a potential energy curve indicates the equilibrium internuclear distance (bond length) on the x-axis and the bond dissociation energy (depth of the potential well) on the y-axis. As the size of the halogen atom increases down the group ( F Conversely, as bond length increases, bond strength decreases. Thus, the bond dissociation energy follows the order: HF > HCl > HBr > HI . Analyzing the curves: Curve P has the shortest bond length and highest bond energy, so it represents HF (A II). Curve Q has th