ANS:C - q = 1

In distillation, where 𝑞q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed, 𝑞>1q>1. When the feed to a distillation column is saturated liquid, it means that it contains both liquid and vapor phases in equilibrium. In this case, the liquid entering the column is typically richer in the more volatile component compared to the equilibrium composition at the top of the column. As a result, to achieve separation, more liquid needs to be removed in the stripping section than the amount of feed introduced. Therefore, 𝑞q is greater than 1 for saturated liquid feed in distillation. This indicates that more moles of liquid flow in the stripping section per mole of feed introduced to achieve the required separation.