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Give reason for the following: Blue so...

Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to the solution.

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ICSE-CHEMICAL CHANGES AND REACTIONS-EXERCISE 2(C)
  1. Give reason for the following: Blue solution of copper sulphate chan...

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  2. What is a chemical change ? Give two examples of chemical change.

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  3. Why energy is involved in a chemical change ?

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  4. What do you understand by chemical reaction ?

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  5. Give an example of a reaction where the following are involved Evolu...

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  6. Give an example of a reaction where the following are involved Absor...

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  7. Give an example of a reaction where the following are involved Pre...

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  8. State the main characteristics of chemical reactions. Give at least on...

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  9. Give an example of each of the following chemical changes. A reactio...

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  10. Give an example of each of the following chemical changes. An exothe...

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  11. Give an example of each of the following chemical changes. A reacti...

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  12. What do you undestand by exothermic reaction and endothermic reaction?...

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  13. State the effects of endothermic and exothermic reactions on the surro...

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  14. Define : Photochemical reaction Give one example.

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  15. Define : Electrochemical reaction Give one example.

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  16. Complete and balance the following reactions : NaCl (aq) + AgNO3 (a...

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  17. Complete and balance the following reactions : Pb(NO3)2 + Kl to

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  18. Complete and balance the following reactions : CuCO3 overset(Delta)t...

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  19. Complete and balance the following reactions : Pb(NO3)2 overset(Delt...

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  20. Complete and balance the following reactions : NH3 + O2 overset(Pt)t...

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  21. What do you observe when Lead nitrate is heated.

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