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Introduction to the Particulate Nature of Matter (DP IB Chemistry: SL): Exam Questions

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11 mark

Which equation below represents deposition?

  • 2Al (s) + 3Br2 (g)  →  2AlBr3 (s)

  • MgCO3 (s) + 2HCl (aq)  →  MgCl2 (aq) + CO2 (g) + H2O (l)

  • I2 (g)  →  I2 (s)

  • HgCl2 (s)  →  HgCl2 (g)

Choose your answer

21 mark

Below are three statements about mixtures. Which of them are correct?

I    Mixtures can contain elements and compounds.

II   The components of a mixture must be in the same state.

III The components of a mixture keep their own properties.

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

Choose your answer

31 mark

Which box shows a heterogeneous mixture? 

1-1-ib-chemistry-mcq-q4-easy

    Choose your answer

    11 mark

    Which equation does not represent sublimation or deposition?

    • NH3 (g) + HCl (g) → NH4Cl (s)

    • I2 (s) → I2 (g)

    • C16H10O (s) → C16H10O (g) 

    • H2O (g) → H2O (s)

    Choose your answer

    21 mark

    Which of the following is a heterogeneous mixture?

    • An aqueous solution of copper(II) chloride

    • An alloy of iron, carbon and chromium

    • A mixture of sulfur and potassium chloride 

    • A mixture of ammonia, hydrogen sulfide and methane gases

    Choose your answer

    31 mark

    Which statement is correct about recrystallisation when purifying a solid?

    • The solid must be insoluble in the hot solvent

    • The impurities will remain in the solvent when cooled

    • The yield of product is the same after recrystallisation 

    • The solvent is in excess during recrystallisation

    Choose your answer

    11 mark

    The correct combination relating to state change, particles and energy is:

    A

    Subliming

    particles move further apart

    particles gain energy

    B

    Vaporising

    particles come closer together

    particles gain energy

    C

    Melting

    particles move further apart

    particles lose energy

    D

    Condensing

    particles come closer together

    particles gain energy

      Choose your answer

      21 mark

      Which of the following mixtures cannot be classified as homogeneous?

      • Salt solution

      • Brass

      • Orange juice that has been filtered

      • Concrete

      Choose your answer

      31 mark

      The order in which oxygen, methane, nitrogen and argon will diffuse from slowest to fastest, at the same conditions of temperature and pressure is:

      • O2 ﹤ N2 ﹤ Ar ﹤ CH4

      • CH4 ﹤ Ar ﹤ N2 ﹤ O2

      • N2 ﹤ O2 ﹤ Ar ﹤ CH4

      • Ar ﹤ O2 ﹤ N2 ﹤ CH4

      Choose your answer

      41 mark

      Chlorofluorocarbons have been used extensively as liquid coolants in refrigerators and air conditioners. Which of the following descriptions explains how a refrigerant works?

      • At high pressure the liquid evaporates and absorbs heat, cooling the surroundings

      • At low pressure the liquid evaporates and absorbs heat, cooling the surroundings

      • At high pressure the liquid condenses and absorbs heat, cooling the surroundings

      • At low pressure the liquid condenses and absorbs heat, cooling the surrounding

      Choose your answer