Question

I'm currently doing Organic Chemistry (grade 12), I'm having issues with naming the catalysts of all reactions (addition, substitution, elimination, and combustion). My question is how do I know if the catalyst I'm using is right and what are all the general catalyst for addition, substitution, elimination, and combustion? Is there a pattern or a group specific catalysts for each (addition, substitution, elimination, and combustion)? What am I missing?