Propane
C3H8
A student has two test tubes labeled A and B, each containing a colorless liquid. The student adds several drops of potassium permanganate solution to each one. The solution in test tube A turned purple, while the solution in test tube B turned brown. Which test tube, A or B, contains an alkane? Justify your answer.
Why must all open flames be extinguished before performing the bromine and potassium permanganate tests? Because both of these chemicals are highly reactive and can cause combustion. It is important to ensure safety and prevent any accidents.