Which of the following plots represent an exothermic reaction

Options

A.
B.
C.
D.

Answer

A

Explanation

ln `K_p = -(DeltaH)/(RT) +` constant
For exothermic reaction, `DeltaH` is –ve. So when ln `K_p` is plotted against 1/T, it.s a straight line with positive slope and positive intercept.