Q1: With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)

ANS:A - increases

With an increase in temperature, the rate of extraction in a solid-liquid extraction system typically increases. This increase in temperature enhances the solubility of the solute in the solvent, leading to faster dissolution of the solute from the solid phase into the liquid phase. Additionally, higher temperatures generally accelerate mass transfer processes, such as diffusion within the solid and diffusion through the liquid boundary layer, further increasing the rate of extraction. Therefore, the rate of extraction in leaching systems often shows a positive correlation with temperature. "Increases" indicates a rise or upward trend in a particular parameter or variable. In the context of the rate of extraction in a solid-liquid extraction system increasing with temperature, "increases" suggests that as the temperature rises, there is a corresponding rise in the rate at which the solute is extracted from the solid phase into the liquid phase. This increase may occur due to several factors:

1. Enhanced Solubility: Higher temperatures generally increase the solubility of solutes in solvents, allowing more solute to dissolve into the liquid phase.
2. Accelerated Mass Transfer: Increased temperature can accelerate mass transfer processes, such as diffusion, leading to faster movement of solute from the solid phase to the liquid phase.
3. Improved Kinetics: Chemical reactions involved in the extraction process may proceed more rapidly at higher temperatures, leading to a higher rate of extraction.