When heat is added to a system then the following is not possible?

When heat is added to a system, which of the following is not possible ?

When a catalyst is added to a system the:

Heat added to a system is equal to

"When heat is added to a system, the internal energy of the system must increase". Justify this statement.

If 150 J of heat is added to a system and the work done by the system is 110 j. then change in internal energy wil be

If 150 J of heat is added to a system and the work done by the system is 110 j. then change in internal energy wil be