Chemistry in Everyday Life Full Materiel

6th Standard

    Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. Soaps were originally made from________.

    (a)

    proteins

    (b)

    animal fats and vegetable oils

    (c)

    chemicals extracted from the soil

    (d)

    foam booster

  2. The saponification of a fat or oil is done using _______________ solution for hot process.

    (a)

    Potassium hydroxide

    (b)

    Sodium hydroxide

    (c)

    Hydrochloric acid

    (d)

    Sodium chloride

  3. Gypsum is added to the cement for _______.

    (a)

    fast setting

    (b)

    delayed setting

    (c)

    hardening

    (d)

    making paste

  4. Phenol is _______.

    (a)

    carbolic acid

    (b)

    acetic acid

    (c)

    benzoic acid

    (d)

    hydrochloric acid

  5. Natural adhesives are made from ________.

    (a)

    Protein

    (b)

    fat

    (c)

    starch

    (d)

    vitamins

  6. 5 x 1 = 5
  7. _________ gas causes tears in our eyes while cutting onions.

    ()

    Propanethial s-oxide

  8. Water, coconut oil and __________ are necessary for soap preparation.

    ()

    animal fat

  9. ____________ is called as farmer’s best friend.

    ()

    Earthworm

  10. ___________ fertilizer is ecofriendly

    ()

    Organic

  11. _________ is an example for natural adhesive.

    ()

    Strach

  12. 5 x 1 = 5
  13. Soap

  14. (1)

    NPK

  15. Cement

  16. (2)

    NaOH

  17. Fertilizers

  18. (3)

    RCC

  19. Gypsum

  20. (4)

    C6H5 OH

  21. Phenol

  22. (5)

    CaSO4 2H2O

    5 x 2 = 10
  23. What are the three main constituents of soap?

  24. What are the two different types of molecules found in the soap?

  25. Mention any three physical properties of phenol.

  26. Explain the uses of plaster of paris.

  27. Why gypsum is used in cement production?

  28. 1 x 5 = 5
  29. How are detergents manufactured?

  30. 5 x 1 = 5
  31. Concentrated phenol is used as a disinfectant.

    (a) True
    (b) False
  32. Gypsum is largely used in medical industries.

    (a) True
    (b) False
  33. Plaster of Paris is obtained from heating gypsum.

    (a) True
    (b) False
  34. Adhesives are the substances used to separate the components.

    (a) True
    (b) False
  35. NPK are the primary nutrients for plants.

    (a) True
    (b) False
  36. 4 x 3 = 12
  37. Why earthworm is called as farmer’s friend?

  38. Explain the process of manufacturing cement.

  39. What are uses of Gypsum?

  40. Ravi is a farmer; he rears many cattle in his farm. His field has many bio wastes. Advise Ravi how to change this bio waste to compost by using vermi -composting techniques. Explain the benefits of vermi castings.

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