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Across 1. Common name of Sodium hydrogen carbonate (2 Words) 4. Lime stone, Marble and chalk are examples of (2 Words) 5. The process of dissolving an acid or base in water is highly________ 6. with the increase in concentration of hydrogen ions, the pH value will 9. Characteristic smell of onion is destroyed in the __________ medium 10. Litmus is extracted from 11. Indicators giving different odours in acidic and basic medium 12. Carbonates and bicarbonates of metal react with acids to give 13. Name of acid which the bee-sting leaves 16. Calcium sulphate hemihydrate is also called (3 Words) 17. Metal oxides are 19. An indicator that remains colourless in the presence of an acid

Down 2. reaction between acids and bases to give salt and water is (2 Words) 3. Common name of calcium oxychloride (2 Words) 7. Water soluble bases are called 8. Vanilla retains its smell in ___________ medium 14. a flower which is natural indicator 15. Electric current is carried through the solution by 18. Colour of methyl orange in acidic medium