Question

You are given a sample of benzoin that has been contaminated with anthracene and you purify this sample by recrystallization. Which of the following is a possible melting point you may measure if you did not successfully purify benzoin and it is still contaminated with anthracene? (literature melting points: benzoin 134-138C; anthracene 210-215C).

A. 120-130B. 172-175C. 134-136D. 210-212

Answer 1

The correct option is A

Step-by-step explanation:

Now from the question we are told that the purification of benzoin was not successful and generally for every substance , it melting point at the pure state is higher that its melting point at its impure state, with this knowlege and the information given in the question that the melting point of benzoin at it pure state is (134-138 ) °C, we can deduce that the melting we may measure if we did not successfully purify benzoin and it is still contaminated with anthracene is (120-130) °C