Question

Give the example of the gas which rivers kp is equal to kc

Answer 1

The picture shows the correct answers to this question.

I'm not sure why these answers are correct. Kp only counts with gases, while Kc only counts with aqueous solution + gases. I assumed that any reactions with only gases, or a mix of gases and solids, will have an equal Kp and Kc value but that is clearly not the case.