GCSE CHEMISTRY Higher Tier Paper 2

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his question is about fuels and energy. box Figure 1 shows the percentage of electricity generated in the UK between 2007 and 2017 using: • oil • solar energy. Figure 1 0 1 . 1 Describe the ... changes in the percentage of electricity generated in the UK between 2007 and 2017 using: • oil • solar energy. Use data from Figure 1 in your answer. [3 marks]4 *04* IB/M/Jun21/8462/2H Do not write outside the 0 1 . 2 Oil contains carbon and some sulfur. box When oil is burned, the products of combustion may be released into the atmosphere. Explain the environmental effects of releasing these products of combustion into the atmosphere. [6 marks]5 *05* Turn over ► IB/M/Jun21/8462/2H Do not write outside the box 12 0 1 . 3 Suggest one reason why using solar energy is a more sustainable way of generating electricity than burning oil. [1 mark] 0 1 . 4 Solar energy may not be able to replace the generation of electricity from fossil fuels completely. Suggest two reasons why. [2 marks] 1 2 Turn over for the next question6 *06* IB/M/Jun21/8462/2H Do not write outside the 0 2 This question is about alkanes. box Table 1 shows information about some alkanes. Table 1 Number of carbon atoms in alkane molecule Boiling point of alkane in °C 4 0 5 36 6 69 7 X 8 126 9 151 0 2 . 1 Plot the data from Table 1 on Figure 2. [2 marks] Figure 27 *07* Turn over ► IB/M/Jun21/8462/2H Do not write outside the 0 2 . 2 Predict the boiling point X of the alkane with seven carbon atoms in a molecule. box Use Table 1 and Figure 2. [1 mark] X = °C 0 2 . 3 Figure 2 is not suitable to show the boiling point of the alkane with three carbon atoms in a molecule. Suggest one reason why. [1 mark] 0 2 . 4 What is the state at 20 °C of the alkane with four carbon atoms in a molecule? Use Table 1. [1 mark] Question 2 continues on the next page8 *08* IB/M/Jun21/8462/2H Do not write outside the box 8 Table 1 is repeated below. Table 1 Number of carbon atoms in alkane molecule Boiling point of alkane in °C 4 0 5 36 6 69 7 X 8 126 9 151 The alkane with nine carbon atoms in a molecule is called nonane. 0 2 . 5 Complete the formula of nonane. [1 mark] C9H ___ 0 2 . 6 Nonane will condense lower in a fractionating column during fractional distillation than the other alkanes in Table 1. Explain why. You should refer to the temperature gradient in the fractionating column [Show More]

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