1. Which of the following is not an acid?   NaOH   HNO3   HCl   H2SO4   Hint Half-n-half Clue   2. A substance that absorbs moisture is known as   Hydrophilic   Hygroscopic   Amorphous   Hydrophobic   Half-n-half Clue   3. Lemon juice is   Metallic   Basic   Acidic   Neutral   Half-n-half Clue   4. Which of the following is a chemical change?   Rusting of iron   Freezing of water   Boiling of water   Dissolving of salt in water   Half-n-half Clue   5. A pH of below 7 indicates   Acidity   Presence of Ions   Alkalinity   Purity of the sample   Half-n-half Clue   6. If no more solute can be dissolved in a solvent at a given temperature then that solution is called   A Dispersed Solution   An Unstable Solution   A Saturated Solution   A Real Solution   Half-n-half Clue   7. Heat is liberated in   Exothermic Reactions   Endothermic Reactions   All chemical reactions   Substitution Reactions   Half-n-half Clue