There are two types of commandments: chukkim and mishpatim. Mishpatim are those for which a good reason quickly comes to mind, such as "Do not steal". Chukkim are those for which a good reason does not come to mind, such as the red heifer.
Did commentators compile lists of the commandments they deem to be chukkim? Or, since what sounds like a mishpat to one person could be a mysterious chok to another, none tried?