Step-by-step explanation:
A catalyst is a substance which helps in increasing the rate of a chemical reaction without itself getting consumed in the reaction.
So, when two compounds are not able to react chemically then adding a catalyst will not be able to make them react chemically with each other.
This is because a catalyst can only be of use if it is added in a reaction where the species are chemically reacting with each other. Making compounds to react chemically is not a function of catalyst.
That is why, the chemist incorrect in the given situation.