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Matter Around Us Important Question Paper In 9th Science Aug-01 , 2018

Based on the chapter  Matter Around Us, some of the important questions are covered in this question paper. The questions are prepared from the book back and the creative questions.
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Matter Around Us Important Question Paper In 9th Science

Matter Around Us - Important Question Paper

9th Standard

    Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 50

    Part A

    10 x 1 = 10

  1. The physical state of water at 373 K is

    (a)

    Solid

    (b)

    liquid

    (c)

    vapour

    (d)

    plasma

  2. Among the following______is a mixture

    (a)

    Common Salt

    (b)

    Juice

    (c)

    Carbon dioxide

    (d)

    Pure Silver

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

    (a)

    Heterogeneous Mixture

    (b)

    Homogeneous Mixture

    (c)

    Compound

    (d)

    Suspension

  4. The constituents that form a mixture are also called

    (a)

    Elements

    (b)

    Compounds

    (c)

    Alloys

    (d)

    Components

  5. __________ has the same properties throughout the sample

    (a)

    Pure substance

    (b)

    Mixture

    (c)

    Colloid

    (d)

    Suspension

  6. Difference in ________________is the principle used in fractional distillation

    (a)

    solubility

    (b)

    melting point

    (c)

    boiling point

    (d)

    adsorption

  7. The separation of denser particles from lighter particles done by rotation at high speed is called ________

    (a)

    Filtration

    (b)

    sedimentation

    (c)

    decantation

    (d)

    centrifugation

  8. ______ is essential to perform separation by solvent extraction method.

    (a)

    Separating funnel

    (b)

    centrifuge machine

    (c)

    filter paper

    (d)

    sieve

  9. Filtration method is effective in separating _______ mixture

    (a)

    Solid-solid

    (b)

    solid-liquid

    (c)

    liquid-liquid

    (d)

    liquid-gas

  10. For a simple distillation process we need to have

    (a)

    an evaporating dish

    (b)

    a separating funnel

    (c)

    a filter with filter paper

    (d)

    a Liebig condenser

    11. Part B

    7 x 1 = 7

  11. 1500C = __________ K

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      1773.15 oK

  12. Evaporation is always accompanied by______________ in temperature

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    increase

  13. A _____mixture has no distinguishable boundary between its components

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    homogeneous

  14. Latent heat is the energy used for ________

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    change of state

  15. Alcohol can be separated from water by _________________

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    fractional distillation

  16. Sand is removed from naphthalene by ___________ method.

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    sublimation

  17. In petroleum refining, the method of separation used is _______

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    Fractional distillation

    18. Part C

    4 x 2 = 8

  18. How gaseous pressure arises?

  19. Define Sublimation.

  20. Which state of matter has the highest kinetic energy?

  21. Define a solute and a solvent

    22. Part D

    5 x 3 = 15

  22. Which of the following are pure substances? Ice, Milk, Iron, Hydrochloric acid, Mercury, Brick and Water.

  23. Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?

  24. What is an adsorbate and adsorbent?

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

  26. How will you separate a mixture containing saw dust, naphthalene and iron filings?

    27. Part E

    2 x 5 = 10

  27. Explain Tyndall effect and Brownian movement with suitable diagram.

  28. How are homogenous solutions different from heterogeneous solution? Explain with examples.

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