One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult’s law is obeyed, then changing the feed composition would effect ?

• A. The product composition but not the fraction vaporised
• B. The product composition as well as the fraction vaporised
• C. The fraction vaporised but not the product composition
• D. Neither the product composition nor the fraction vaporised