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Write the chemical formula of gypsum. Ho...

Write the chemical formula of gypsum. How is it converted into plaster of Paris ?

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(a). What is plaster of paris? Write the chemical formula of plaster of paris. (b) How is plaster of paris prepared? Write chemical equation of the reaction involved. (c) Explain why plaster of paris should be stored in a moisture-proof container. (d) State two important uses of plaster of paris.

BHARATI BHAWAN (ENGLISH)-COMPOUNDS OF COMMON USE-Short Answer Questions
  1. How is sodium carbonate converted into sodium bicarbonate ?

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  2. Name the chemical substance which is used as a flux in the extraction ...

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  3. Are the crystalline salts really dry ? Give your answer with reasons .

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  4. A white compound of sodium is used to remove hardness of water and asl...

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  5. Explain why baking soda is used as an antacid .

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  6. Name the compound of calcium which gets hardened when treated with wat...

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  7. Write the chemical formula of gypsum. How is it converted into plaster...

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  8. Why is plaster of paris stored in a moistureproof vessel ?

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  9. What is the difference between slaked lime and lime water ?

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  10. Why is sodium chloride required in our body?

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  11. What happens when a sample of sodium hydrogen carbonate is heated ? Wr...

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  12. What happnes when bleaching powder is heated with dilute H(2)SO(4) ? ...

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  13. How many molecules of water of crystallization are present in the foll...

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  14. (a). What is bleaching powder? How is bleaching powder prepared? Write...

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  15. Describe an activity to show that blue copper sulphate contain water o...

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  16. Why is the formula of plaster of paris written as CaSO(4) .1/2 H(2)O ...

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  17. Give the important properties of baking soda.

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  18. Give two important uses of washing soda and baking soda each.

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  19. Describe the manufacture of bleaching powder why does its effectivness...

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  20. What is the function of common salt in the manufacture of soap ?

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