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(a) What is the colour of ferrous sulpha...

(a) What is the colour of ferrous sulphate crystals ? How does this colour change after heating?
(b) Name the product formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change?

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Colour of ferrous sulphate crystals

Action of heat on ferrous sulphate crystals is an example of decomposition reaction .

2g of ferrous sulphate crystals are heated in a boiling tube. (i) State the colour of ferrous sulphate crystals both before heating and after heating. (ii) Name the gases produced during heating. (iii) Write the chemical equation for the reaction.

Crystals of copper sulphate are heated in a test tube fore some time. (a) What is the colour of copper sulphate crystal (i) before heating (ii) after heating ? (b) What is the cource of liquid droplets seen on the inner upper side of the test tube during the heating process ?

LAKHMIR SINGH & MANJIT KAUR-CHEMICAL REACTIONS AND EQUATIONS -Exercise
  1. (a) Difine a combination reaction. (b) Give one example of a combina...

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  2. (a) Give an example of an oxidation reaction. (b) Is oxidation an ex...

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  3. (a) What is the colour of ferrous sulphate crystals ? How does this co...

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  4. What is a decompostion reaction? Give an example of a decompostion rea...

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  5. Zinc oxide reacts whith carbon, on heating, to from zinc metal and car...

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  6. Give one example of an oxidiation-reduction reactin which is also: (...

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  7. (a) What is the difference between displacement and double displacemen...

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  8. (a) Example the folloeing in terms of gain or loss of oxygen with one ...

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  9. (a) Define the following in terms of gain or loss of hydrogen with one...

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  10. What is menal by (a) displacement reactinon, and (b) double displaceme...

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  11. (a) Why are decomposition reactions called the opposite of combination...

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  12. (a) What heppens when a piece of iron metal is placed in copper sulpha...

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  13. In the reaction epresented by the following equation: CuO(s) +H(2)(g...

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  14. What happens when silver nitrate solution is added to sodium chloride ...

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  15. What happens when silver chloride is exposed to sunlight ? Write a che...

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  16. What happens when a zinc strip is dipped into a copper sulphate soluti...

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  17. (a) Explain the term "corrosion" with an example. Wriite a chemical eq...

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  18. (a) Explain the term "rancidity". What damage is caused by rancidity ?...

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  19. (a) What happens when an aqueous solutin of sodium sulphate reacts wit...

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  20. The removal of oxygen from a substance is called :

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