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Why does the colour of copper sulphate s...

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

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Assertion (A): The colour of copper sulphate solution changes when a piece of zinc is dropped in it Reason (R): Copper is more reactive than zinc.

Give reasons for the following: Blue colour of copper sulphate solution is destroyed when iron filings are added to it.

What changes do you observe in the iron nails and colour of copper sulphate solution if the nails are dipped in CuSO_(4) solution for 15 minutes ?

Blue colour of CUSO_(4) solution is discharge slowly when an iron rod is dipped into it. Why?

What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?

LAKHMIR SINGH & MANJIT KAUR-CHEMICAL REACTIONS AND EQUATIONS -Exercise
  1. What type of reaction is represented by the digestion of food in our b...

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  2. Name the various types of chemical reactions.

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  3. Why does the colour of copper sulphate solution change when an iron na...

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  4. Write the balanced chemical equation for the following reaction: Zin...

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  5. Which term is used to indicate the development of unpleasant smell and...

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  6. What is the general name of the chemicals which are added to fat and o...

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  7. State an important use of decomposition reactions.

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  8. What are anti-oxidants ? Why are they added to fat and oil containing ...

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  9. Explain why, food products containing fats and oils (like potato chips...

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  10. Give one example of a decomposition reaction which is carried out: (...

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  11. What type of chemical reaction is used to extract metals from their na...

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  12. Name two anti-oxidants which are usually added to fat and oil containi...

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  13. Write one equation each for decomposition reactions where energy is su...

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  14. In the refining of silver, the recovery of silver from silver nitrate ...

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  15. What type of eactions are represented by the following equations ? {...

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  16. What type of chemical reactins take place when: (a) a magnesium wire...

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  17. What type of chemical reactions are represented by the following equat...

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  18. Balance the following chemical equations (a) FeSO(4)overset("Heat")t...

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  19. Which of the following is a combination and which is a displacement re...

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  20. What type of reactions are represented by the following equations? (...

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