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How can you say that rusting is a chemic...

How can you say that rusting is a chemical change? What factors are favourable for speed rusting?

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VGS PUBLICATION-BRILLIANT-CHANGES AROUND US-EXERCISE
  1. Think about the following changes and decide whether they are physical...

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  2. Do copper articles get rust? When rusting becomes faster? What change ...

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  3. How can you say that rusting is a chemical change? What factors are fa...

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  4. What are the methods you suggest to prevent the rusting of iron?

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  5. Do all the materials get rusted or react with oxygen in the air?

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  6. What changes do you notice when few pieces of ice in a beaker are heat...

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  7. What changes do you observe when some material is burning? What do you...

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  8. What happens when magnesium ribbon is burnt in air? What type of subst...

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  9. What happens if you put an iron nail in copper sulphate solution? Desc...

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  10. Describe how do you perform the activity to observe the reaction of vi...

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  11. How do you produce large size of sugar crystals? What type of change i...

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  12. What do you observe on the cut pieces of fruits and vegetables? Why do...

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  13. How can we prevent browning of cut vegetables and fruits?

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  14. Rust is

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  15. Depositing one metal on another metal is

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  16. This metal is generally used for Galvanisation.

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  17. …………… prevents the outer surface of potato from colouring

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  18. Ascorbic Acid is

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  19. Magnesium Hydroxide is

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  20. Lime water changes to milky is a

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