Matter around us Two Marks Question

9th Standard

    Reg.No. :
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Science

Time : 00:45:00 Hrs
Total Marks : 20
    10 x 2 = 20
  1. How gaseous pressure arises?

  2. Define Sublimation

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

  4. Name the method you would adopt to separate a mixture of ammonium chloride and common salt.

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

  6. 'Shake well before use'.This is the instruction on a bottle of medicine.What kind of a mixture is contained in the bottle? Give reason.

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

  8. The most appropriate labelling of X and Y in a filtration set up are

      X Y
    (a) precipitate solvent
    (b) solvent solute
    (c) residue filtrate
    (d) filtrate residue
  9. Is air a pure substance or Mixture? Justify

  10. You must have seen brass statues in museums and places of worship.Brass is an alloy made up of approx.30% zinc and 70% copper.Is Brass a pure substance or a mixture or compound?

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