1. What gas is evolved when dilute sulphuric acid is added to Zinc?   Hydrogen   Sulphur Dioxide   Argon   Hydrogen Peroxide   Hint Half-n-half Clue   2. Which of the following is a chemical change?   Boiling of water   Rusting of iron   Dissolving of salt in water   Freezing of water   Half-n-half Clue   3. The lead of a pencil mainly contains   Plastics   Graphite   Carbon Black   Lead   Half-n-half Clue   4. Fill in the missing word Acid + _______ = Salt + Water   Metal   Oxygen   Non Metal   Base   Half-n-half Clue   5. Fizziness in Coco-Cola/Pepsi is caused by   Helium   Nitrogen   Hydrogen   Carbon Dioxide   Half-n-half Clue   6. Which of the following gases is green in color?   Chlorine   Hydrogen   Neon   Krypton   Half-n-half Clue   7. Which of the following is not an allotrope of carbon   Charcoal   Diamond   Graphite   Silk   Half-n-half Clue