1. Which of the following gases is green in color?   Hydrogen   Neon   Krypton   Chlorine   Hint Half-n-half Clue   2. A pH of below 7 indicates   Presence of Ions   Purity of the sample   Acidity   Alkalinity   Half-n-half Clue   3. The two allotropes of phosphorus are   Crystalline Phosphorus, Amorphous Phosphorus   Rhombic Phosphorus, Monoclinic Phosphorus   Alpha Phosphorus, Beta Phosphorus   Red Phosphorus, Yellow Phosphorus   Half-n-half Clue   4. A substance which speeds up a chemical reaction without itself getting affected is known as a   Catalyst   Counter Ion   Cation   Nucleus   Half-n-half Clue   5. Heat is liberated in   Endothermic Reactions   Substitution Reactions   Exothermic Reactions   All chemical reactions   Half-n-half Clue   6. The lead of a pencil mainly contains   Graphite   Carbon Black   Lead   Plastics   Half-n-half Clue   7. Catalysts often speed up certain chemical reactions.   True   False