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2 marksRates of Reaction

CSEC Chemistry · May/June 2007 · Paper 2 · Question 5(d)(ii)

It has been suggested that the amount of polluting gases emitted into the atmosphere, such as the oxides of sulphur and nitrogen which are acidic, could be reduced by first passing exhaust air from factories through beds of powdered reagents. Based on this information:

Suggest why the reagent you have named in (d) (i) above should be used in the powdered form.

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Other parts of this question

  1. 5(a)(i)Amphoteric oxide[2 marks]
  2. 5(a)(ii)Acid anhydride[2 marks]
  3. 5(b)(i)To determine if zinc oxide is amphoteric[5 marks]
  4. 5(b)(ii)To determine if zinc oxide is an acid anhydride[1 mark]
  5. 5(c)(i)Write the formula for sulphur (IV) oxide.[1 mark]
  6. 5(c)(ii)Write an equation for the reaction between sulphur (IV) oxide and water.[1 mark]
  7. 5(d)(i)Give the name of ONE reagent that could be used for this purpose. Support your answer by writing a chemical equation, using ONE of the named pollutants…[2 marks]

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