Across
- 5. Zinc and Lead are more reactive elements than _________.
- 6. Copper gets covered with a _________ coating on exposure to the moist air .
- 7. A reaction in which when two or more substances combine to form a single product.
- 10. AB + C gives A + BC , which type of reaction is this .
- 13. Reaction that are opposite to Combination reactions.
- 14. Egg, chalk, marble, and this rock are made of calcium carbonate.
- 15. Substance that speeds up a chemical reaction without being consumed.
- 16. A reaction where there is gain of hydrogen and electrons .
- 20. Respiration is an example of which reaction in which energy is produced.
- 21. A substance “X” used in for whitewashing and to give a shiny finish to the walls .
Down
- 1. A Reaction when two compound exchange ions .
- 2. Substance that gains electrons and causes oxidation in a reaction.
- 3. Reactions in which insoluble salts is produced .
- 4. When Quick lime reacts with Water it forms.
- 8. A side where reduction occurs in the electrolysis of water .
- 9. When Lead nitrate reacts with Lead oxide in heat it gives out nitrogen dioxide and oxygen. What is the color of nitrogen dioxide fumes .
- 11. Reaction used in the black and white photography .
- 12. The reaction between acid and base to form salt and water .
- 17. Reaction in which energy is absorbed.
- 18. A reaction when Oxidation and Reduction reactions occur together it is known as ?
- 19. Ferrous Sulphate crystals lose water when _________.