1. If no more solute can be dissolved in a solvent at a given temperature then that solution is called _______.   a real solution   a saturated solution   a dispersed solution   an unstable solution   Hint Half-n-half Clue   2. Solubility of a substance in a solvent usually increases with an increase in temperature.   True   False   3. Lemon juice is _______ in nature.   basic   acidic   neutral   metallic   Half-n-half Clue   4. Which of the following is not a physical change?   Oxidation   Precipitation   Distillation   Decantation   Half-n-half Clue   5. A pH below 7 indicates _______.   presence of ions   purity of the sample   alkalinity   acidity   Half-n-half Clue   6. Acids turn blue litmus paper _______.   red   colorless   pink   yellow   Half-n-half Clue   7. Heat is liberated in _______ reactions.   endothermic   substitution   exothermic   all chemical   Half-n-half Clue