Matter Around Us Important Questions

9th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  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. __________ has the same properties throughout the sample

    (a)

    Pure substance

    (b)

    Mixture

    (c)

    Colloid

    (d)

    Suspension

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

    (a)

    Filtration

    (b)

    sedimentation

    (c)

    decantation

    (d)

    centrifugation

  5. 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

  6. 6 x 1 = 6
  7. Evaporation is always accompanied by______________ in temperature

    ()

    increase

  8. An example of a substance that sublimes is ________

    ()

    camphor

  9. Alcohol can be separated from water by _________________

    ()

    fractional distillation

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

    ()

    Fractional distillation

  11. The solubility of solid in water _______with an increase in temperature

    ()

    increases

  12. All matter is made up of tiny particles and these particles are in constant motion which possess________

    ()

    Kinetic energy

  13. 5 x 1 = 5
  14. Liquids expand more than gases on heating.

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

    (a) True
    (b) False
  16. Oil and water are immiscible in each other

    (a) True
    (b) False
  17. Milk is an example of an emulsion of fat and curd

    (a) True
    (b) False
  18. Chromotography is used extensively in physical science

    (a) True
    (b) False
  19. 5 x 1 = 5
  20. Element

  21. (1)

    Adsorbent

  22. Suspension

  23. (2)

    Mixture of two solids - Sublimation

  24. Charcoal

  25. (3)

    Settles down on standing

  26. Sand and camphor

  27. (4)

    Made up of atoms

  28. Salt and water

  29. (5)

    Soluble - Distillation

    6 x 2 = 12
  30. Define Sublimation

  31. A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?

  32. Define a solute and a solvent

  33. What is meant by desalination of sea water?

  34. What produces more severe burns, boiling water or steam? Why?

  35. Is air a pure substance or Mixture? Justify

  36. 4 x 3 = 12
  37. Why are gases easily compressible whereas solids are incompressible?

  38. Differentiate between filtrate and distillate

  39. What is kinetic particle theory of matter?

  40. What is melting point?

  41. 1 x 5 = 5
  42. How are homogenous solutions different from heterogeneous solution? Explain with examples

*****************************************

Reviews & Comments about 9th Standard Science Chapter 4 Matter Around Us Important Question Paper

Write your Comment