Matter around us Book Back Questions

9th Standard

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Science

Time : 00:45:00 Hrs
Total Marks : 30
    3 x 1 = 3
  1. The physical state of water at 373 K is

    (a)

    Solid

    (b)

    liquid

    (c)

    vapour

    (d)

    plasma

  2. When we mix a drop of ink in water we get a__________

    (a)

    Heterogeneous Mixture

    (b)

    Homogeneous Mixture

    (c)

    Compound

    (d)

    Suspension

  3. Filtration method is effective in separating _______ mixture

    (a)

    Solid-solid

    (b)

    solid-liquid

    (c)

    liquid-liquid

    (d)

    liquid-gas

  4. 4 x 1 = 4
  5. 1500C = __________ K

    ()

      

  6. An example of a substance that sublimes is ________

    ()

    camphor

  7. Latent heat is the energy used for ________

    ()

    change of state

  8. Alcohol can be separated from water by _________________

    ()

    fractional distillation

  9. 3 x 1 = 3
  10. A compound cannot be broken into simpler substances chemically

    (a) True
    (b) False
  11. Buttermilk is an example of heterogeneous mixture

    (a) True
    (b) False
  12. Sublimation is the property of a substance to directly change from liquid to solid state.

    (a) True
    (b) False
  13. 3 x 2 = 6
  14. How gaseous pressure arises?

  15. Define a solute and a solvent

  16. You have just won a medal made of 22-carat gold.Have you just procured a pure substance or impure substance?

  17. 3 x 3 = 9
  18. Hold a ‘smiley ball’ and squeeze it. Can you compress it? Justify your answer?

  19. What is an adsorbate and adsorbent?

  20. Name the apparatus that you will use to separate the components of mixtures containing two, i. miscible liquids, ii. immiscible liquids

  21. 1 x 5 = 5
  22. Explain Tyndall effect and Brownian movement with suitable diagram

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