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''Freshly cut apple turning brown, the i...

''Freshly cut apple turning brown, the iron articles shiny when new, but gradually become reddish brown when left for sometime. …..''. How do these changes occur ?

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Oxygen molecules interact with different substances from metal to living tissue which may come into contact with it. The above changes occur. These are all the examples of the process of oxidation.
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VGS PUBLICATION-BRILLIANT-CHEMICAL REACTIONS AND EQUATIONS-ESSENTIAL MATERIAL FOR EXAMINATION PURPOSE
  1. Why the white washig gives shiny finish to the walls?

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  2. Why the smell and taste of food items change?

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  3. ''Freshly cut apple turning brown, the iron articles shiny when new, b...

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  4. What are new substances formed due to decomposition of lead nitrate?

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  5. Balance the following chemical equation. C(2)H(6)+O(2)rarr CO(2)+H(2)O

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  6. What are antioxidants?

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  7. Which type of reaction involved when silver bromide is exposed to sunl...

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  8. NH(4)Cl rarr NH(3)+HCl . Which type of reaction is the ?

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  9. Jagadeesh saw 10 grams of unknowns substance in a beaker. He pour wate...

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  10. Some quantity of yellow coloured powerd was kept in the sunlight for s...

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  11. Redox reaction : CuO+H(2)overset("Heat")rarr Cu+H(2)O. By seeing the...

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  12. Calcium oxide dissolves in water producing colourless solution. How do...

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  13. Write the apparatus to be used to conduct an experiment of ''Reduction...

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  14. What will happen when iron nails dipped in copper sulphate solution?

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  15. What do you observe by cutting an apple after sometime ?Why

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  16. Some substances are given below. Brass, bronze, copper, gold, stainl...

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  17. Fill the table with suitable answers. {:("Name of the metal","Cu","…...

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  18. Name some oxides of metals and non-metals ?

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  19. How do you appreciate the process Galvanizing?

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  20. Write the greatness of Gold metal.

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