ASChemistryCambridge (CIE)Exam Questions12. Nitrogen & SulfurNitrogen & Sulfur

Nitrogen & Sulfur (Cambridge (CIE) AS Chemistry): Exam Questions

Exam code: 9701

2 hours27 questions

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Nitrogen & Sulfur

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1
1 mark

Which gas is present in the largest proportion in the exhaust fumes of a car engine?

  • Carbon dioxide

  • Carbon monoxide

  • Nitrogen

  • Water vapour

Choose your answer

2
1 mark

Oxidation of ammonia by oxygen is the first step in the manufacture of nitric acid, which is used in the production of the synthetic material nylon.

wO2 (g) + xNH3 (g) → yNO (g) + zH2O (g)

Which row gives the correct values for w, x, y and z?

w

x

y

z

A

5

4

4

6

B

5

6

4

4

C

6

5

4

5

D

6

6

5

4

    Choose your answer

    3
    1 mark

    According to the Brønsted-Lowry theory, which term describes ammonia?

    • Acid

    • Amphoteric

    • Base

    • Neutral

    Choose your answer

    4
    1 mark

    Which statement about the ammonium ion, NH4+, is correct?

    • All bond angles are 107°

    • Ammonium ions are formed when ammonia behaves as an acid.

    • Ammonium ions are unreactive when heated with aqueous sodium hydroxide.

    • The bonds are all the same length.

    Choose your answer

    5
    1 mark

    Which reaction that takes place in a catalytic converter does not remove hazardous gases from car exhaust?

    Diagram showing a catalytic converter with a ceramic honeycomb support coated with precious metal catalysts, used to convert exhaust gases

    • CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

    • 2CH4 (g) + 3O2 (g) → 2CO (g) + 4H2O (g)

    • 2CO (g) + O2 (g) → 2CO2 (g)

    • 2CO (g) + 2NO (g) → 2CO2 (g) + N2 (g)

    Choose your answer

    6
    1 mark

    The manufacture of ammonium nitrate, NH4NO3, occurs on a large scale for use as a fertiliser.

    Which statement about ammonium nitrate fertiliser is not correct?

    • It can cause environmental problems.

    • It consists of 35% nitrogen by mass.

    • It is insoluble in water.

    • Nitric acid is used in its manufacture.

    Choose your answer

    7
    1 mark

    Oxides of nitrogen are released into the atmosphere in car engine exhaust fumes.

    Which environmental problem is not made worse by this occurrence?

    • Acidification of lakes

    • Corrosion of buildings

    • Photochemical smog

    • The enhanced greenhouse effect

    Choose your answer

    1
    1 mark

    Which statement about ammonia is correct?

    • Ammonia acts as a nucleophile by accepting a pair of electrons when it reacts with bromoethane.

    • Ammonia can form a co-ordinate bond with a hydrogen ion to form an ammonium ion.

    • Ammonia is a base and accepts hydroxide ions.

    • The shape of the ammonia molecule is pyramidal with bond angles of 109.5°

    Choose your answer

    2
    1 mark

    “Photochemical smog is produced when    1    acts on    2    and    3   .”

    Which row correctly identifies 1, 2 and 3?

    1

    2

    3

    A

    Heat

    Hydrocarbons

    Oxygen

    B

    Heat

    Nitrogen

    Oxygen

    C

    Sunlight

    Nitrogen oxides

    Hydrocarbons

    D

    Sunlight

    Nitrogen oxides

    Sulfur oxides

      Choose your answer

      3
      1 mark

      Lime, CaO, is used to reduce the acidity of soil, and ammonium nitrate is a nitrogenous fertiliser.

      Which statement explains why these two substances not be mixed together?

      • Calcium nitrate is produced, which hardens water.

      • If damp, ammonia is given off.

      • If damp, nitric acid will form.

      • The dry mixture is explosive.

      Choose your answer

      4
      1 mark

      Nitrogen dioxide, NO2, sulfur dioxide, SO2, and carbon monoxide, CO, are all atmospheric pollutants.

      Which reaction takes place in the atmosphere?

      • CO is spontaneously oxidised to CO2

      • NO2 is reduced to NO by CO

      • NO2 is reduced to NO by SO2

      • SO2 is oxidised to SO3 by CO2

      Choose your answer

      1
      1 mark

      In a car engine, multiple reactions take place as molecules are mixed with oxygen at high temperatures.

      Which of these reactions is endothermic?

      • CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

      • N2 (g) + O2 (g) → 2NO (g)

      • 2NO (g) + O2 (g) → 2NO2 (g)

      • S (s) + O2 (g) → SO2 (g)

      Choose your answer

      2
      1 mark

      Which reaction of ammonia does not involve the nitrogen atom's lone pair?

      • 2NH3 (aq) + Ag+ (aq) → [Ag(NH3)2]+ (aq)

      • NH3 (g) + CH3I (g) → CH3NH3+I- (s)

      • NH3 (g) + HCl (g) → NH4Cl (s)

      • 2NH3 (l) + 2Na (s) → 2NaNH2 (s) + H2 (g)

      Choose your answer

      3
      1 mark

      Car exhausts release pollutant gases including oxides of nitrogen.

      In cities, when a car travels one kilometre, it releases 0.23 g of an oxide of nitrogen NxOy under room conditions, which occupies 120 cm3.

      Which row gives the correct values for x and y?

      x

      y

      A

      1

      1

      B

      1

      2

      C

      2

      1

      D

      2

      4

        Choose your answer

        4
        1 mark

        Ammonium sulfate in the soil is slowly oxidised by air, producing sulfuric acid, nitric acid and water as the only products.

        How many moles of oxygen gas are needed for the complete oxidation of one mole of ammonium sulfate?

        • 1

        • 2

        • 3

        • 4

        Choose your answer

        5
        1 mark

        Aqueous ammonia is added to aqueous sulfur dioxide until just alkaline.

        Which salt is produced in this reaction?

        • (NH4)2SO3

        • (NH4)2SO4

        • NH4HSO3

        • NH4HSO4

        Choose your answer

        6
        1 mark

        The gases nitrogen dioxide (NO2) and sulfur trioxide (SO3) are required during the formation of acid rain.

        In a simulation experiment, a volume of 6.00 dm3 of sulfur trioxide gas is measured under room temperature and pressure (r.t.p.). A total of 0.75 mol of nitrogen dioxide is also present in the reaction chamber along with water vapour.

        What is the final amount, in mol, of nitrogen dioxide in the reaction chamber after all the sulfur trioxide has reacted to form acid rain?

        • 0

        • 0.25

        • 0.50

        • 0.75

        Choose your answer