Edexcel Jan 2017 (IAL) Paper 2 Q10

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8 Hydrogen peroxide decomposes forming water and oxygen. H2O2(aq) (cid:111) H2O(l) + O2(g) Which change does not increase the reaction rate? A Adding the powdered catalyst, MnO2 Increasing the concentration of the hydrogen peroxide from 2 mol dm3 to 4 mol dm3 Increasing the pressure from 2 atm to 4 atm Increasing the temperature from 20(cid:113)C to 40(cid:113)C (Total for Question 8 = 1 mark) 9 Consider the following reaction: Increasing the pressure increases the reaction rate because it X2(g) + 3Y2(g) (cid:85) 2XY3(g) increases molecular energies. B shifts the position of equilibrium to the right. increases the collision frequency. D decreases the activation energy. 10 Which type of radiation is often used in the pharmaceutical industry to heat reaction mixtures? (Total for Question 9 = 1 mark) A Gamma B Microwave C Ultraviolet D X-ray 11 The potassium halides, KCl, KBr and KI, can all react with concentrated sulfuric acid to produce (Total for Question 10 = 1 mark) A hydrogen halides. B hydrogen sulphide. C sulfur dioxide. D sulfur. A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D (Total for Question 11 = 1 mark) *P48368A0524* Turn over<br />

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