Q1: Pick out the wrong statement.

ANS:A - Swenson-Walker crystalliser is a batch crystalliser.

The Swenson-Walker crystallizer is not a batch crystallizer; it's actually a type of continuous crystallizer. In a batch crystallizer, the crystallization process occurs in discrete batches. The solution is fed into the crystallizer, where crystallization takes place over a period of time. Once the desired crystals have formed, the process is stopped, and the crystals are harvested, leaving behind the mother liquor. In contrast, the Swenson-Walker crystallizer operates continuously. It consists of a series of crystallization stages or compartments, with each stage having its own cooling and circulation system. The solution continuously flows through the crystallizer, where cooling or evaporation induces crystallization. As the solution progresses through the stages, the crystals grow and the mother liquor becomes increasingly concentrated. The crystallizer continuously removes both the crystals and the concentrated mother liquor, while fresh solution is continuously fed into the system. The continuous operation of the Swenson-Walker crystallizer allows for a more efficient and consistent production of crystals compared to batch crystallizers. It's commonly used in industries such as sugar refining, chemical processing, and pharmaceutical manufacturing.