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An iron knife kept dipped in a blue copp...

An iron knife kept dipped in a blue copper sulphate solution turns the blue solution to light green.

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Iron is more reactive than Copper. It displaces Cu from `CuSO_(4)` solution and forms Ferrous sulphate which is of light green colour.
`CuSO_(4)(aq)+Fe(s) to FeSO_(4)(aq)+Cu(s)`
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CPC CAMBRIDGE PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-ADDITIONAL QUESTIONS (Anwers the following questions)
  1. When carbon dioxide is passed through lime water, it turns milky. Why?

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  2. A Zinc rod is left for nearly 20 minutes in Copper sulphate solution. ...

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  3. What type of reaction is this : Na(2)SO(4)+BaCl(2) to BaSO(4)+2NaCl

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  4. Why do gold and silver do not corrode ?

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  5. Name the reduching agent in the following reaction. 3MnO(2)+4Al to 2...

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  6. Write the balanced chemical equation for process of photosynthesis. ...

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  7. 2g of ferrous sulphate crystals are heated in a dry tude. List any t...

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  8. Why are decomposition reactions called the opposite of combination rea...

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  9. Write the type of chemical reaction in the following. reaction betwe...

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  10. Why does a copper vessel devlop with green coating in rainy season ?

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  11. Why is hydrogen proxide kept in coloured bottles ?

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  12. Mention any two factors which influence the rate of the reaction.

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  13. Ahmad took a magnesium ribbon and burned it on a flame. The white powd...

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  14. An iron knife kept dipped in a blue copper sulphate solution turns the...

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  15. Identify the reducing agent in the following reaction : Fe(2)O(3)+3C...

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  16. The marble statue often slowly correded when kept in open for a long t...

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  17. Give one example of a combination reaction in which an element combine...

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  18. Name the type of chemical reaction represented by the following equati...

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  19. Write the chemical equation of the reaction with an example each in wh...

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  20. Write chemical equation for the reaction taking place when carried out...

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