MHT CET202519 Apr 2025Evening ShiftChemistryChemical EquilibriumActual
Identify from following salts so that the solubility of salt in water decreases with increase in temperature.
Options
- ANaBr
- BNaCl
- CNaNO ₃
- DNa ₂ SO ₄
Correct answer
D. Na ₂ SO ₄
Step-by-step solution
Most ionic compounds exhibit increased solubility in water with rising temperature due to the endothermic nature of their dissolution process. Applying Le Chatelier's principle, increasing temperature shifts the equilibrium toward the dissolved ions, enhancing solubility. Exceptions occur when dissolution is exothermic. For these salts, elevated temperature shifts equilibrium toward the solid form, reducing solubility. Sodium bromide and sodium chloride solubility increases with temperature, while sodium nitrate sh