Carbon and Its Compounds Model Question Paper

10th Standard EM

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Science

Time : 02:00:00 Hrs
Total Marks : 50
    6 x 1 = 6
  1. The molecular formula of an open chain organic compound is C3H6. The class of the compound is

    (a)

    alkane

    (b)

    alkene

    (c)

    alkyne

    (d)

    alcohol

  2. Rectified spirit is an aqueous solution which contains about _______ of ethanol

    (a)

    95.5 %

    (b)

    75.5 %

    (c)

    55.5 %

    (d)

    45.5 %

  3. TFM in soaps represents ___________ content in soap

    (a)

    mineral

    (b)

    vitamin

    (c)

    fatty acid

    (d)

    carbohydrate

  4. Cyclobutane is an example of ______________ compounds.

    (a)

    a cyclic

    (b)

    cyclic

    (c)

    aromatic

    (d)

    alicyelic

  5. The enzymes present in yeast is / are _____________

    (a)

    invertage

    (b)

    zymase

    (c)

    both (a) and (b)

    (d)

    neither (a) nor (b)

  6. When ethanol reacts with acidified K2Cr2O7 the orange color of K2Cr2O7 changes to _____________

    (a)

    yellow

    (b)

    red

    (c)

    purple

    (d)

    green

  7. 6 x 1 = 6
  8. The general molecular formula of alkynes is _____________

    ()

    CnH2n-2

  9. 100 % pure ethanol is called ____________

    ()

    absolute alcohol

  10. Ethanoic acid turns _______ litmus to _________

    ()

    Blue, Red

  11. The alkaline hydrolysis of fatty acids is termed as _____________

    ()

    Saponification

  12. The simplest alkane is _______________ CH4.

    ()

    methane

  13. Esters have a ___________ odour

    ()

    fruity

  14. 5 x 1 = 5
  15. Functional group –OH

  16. (1)

    Benzene

  17. Unsaturated

  18. (2)

    Benzene

  19. Carbocyclic

  20. (3)

    Alcohol

  21. Hetero cyclic

  22. (4)

    Furan

  23. Aromatic

  24. (5)

    Ethene

    7 x 2 = 14
  25. Name the simplest ketone and give its structural formula.

  26. Classify the following compounds based on the pattern of carbon chain and give their structural formula: (i) Propane (ii) Benzene (iii) Cyclobutane (iv) Furan

  27. How do detergents cause water pollution? Suggest remedial measures to prevent this pollution?

  28. Differentiate soaps and detergents.

  29. Define heterocyclic compounds. Give an example.

  30. What is rectified spirit??

  31. Define fermentation.

  32. 3 x 4 = 12
  33. What is called homologous series? Give any three of its characteristics?

  34. How is ethanol manufactured from sugarcane?

  35. Explain the mechanism of cleansing action of soap.

  36. 1 x 7 = 7
  37. The molecular formula of an alcohol is C4H10O. The locant number of its –OH group is 2.
    (i) Draw its structural formula.
    (ii) Give its IUPAC name.
    (iii) Is it saturated or unsaturated?

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