Explanation:
Since, acid is spilled on the lab floor so, first of all the teacher must be notified about it. As teacher can better tell you what should be done in such a case.
At the same time, rest of the students present in the lab must be notified about it so that no one can accidentally step onto the acid otherwise it might cause a serious injury to anyone.
Thus, we can conclude that rest of the students or classmates should be notified next in the given situation.
