WJEC GCSE Chemistry (Wales) · WJEC 3410U
2 Chemical bonding, application of chemical reactions and organic chemistry
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Chemical bonding, application of chemical reactions and organic chemistry
- When water boils, it undergoes a physical change rather than a chemical change. Explain th… (4 marks, Explain)
- Describe what happens to the particles in a substance when it changes from a liquid to a g… (4 marks, Describe and Explain)
- Crude oil is a mixture of hydrocarbons. Fractional distillation is used to separate crude … (4 marks, Explain)
- Methanol (CH₃OH) and ethanol (C₂H₅OH) are both members of the alcohol homologous series. E… (4 marks, Explain)
- Describe two limitations of the particle model when used to represent the three states of … (4 marks, Describe)
- A student dissolves an unknown white solid in water. The solution is tested with Universal… (4 marks, Explain)
- Iron is extracted from its ore in a blast furnace using carbon. Gold, however, is found na… (4 marks, Explain)
- Methane (CH₄) is a hydrocarbon and the simplest member of the alkane homologous series. Ex… (4 marks, Explain)
- Propane (C₃H₈) is a hydrocarbon fuel used in camping gas stoves. When propane burns comple… (4 marks, Explain)
- Ethane (C₂H₆) and ethene (C₂H₄) are both hydrocarbons. Ethene is described as an unsaturat… (4 marks, Explain)
- Explain why two atoms of the same element can have different mass numbers, and explain why… (4 marks, Explain)
- Chlorine has two main isotopes: chlorine-35 and chlorine-37. Explain what is meant by the … (4 marks, Explain)
- Mendeleev arranged the elements into a periodic table. Explain two reasons why Mendeleev's… (4 marks, Explain)
- Silicon has two naturally occurring isotopes: silicon-28 and silicon-29. Explain why the r… (4 marks, Explain)
- Neon has two main isotopes: neon-20 and neon-22. The relative atomic mass of neon is 20.2.… (4 marks, Explain)
- Chlorine has two naturally occurring isotopes: chlorine-35 and chlorine-37. Explain what i… (4 marks, Explain)
- Zinc can be extracted from zinc oxide by heating it with carbon. However, sodium cannot be… (4 marks, Explain)
- A student makes a salt by reacting dilute nitric acid with sodium hydroxide solution. Expl… (4 marks, Explain)
- A student tests two solutions, X and Y, using Universal Indicator. Solution X gives a red … (4 marks, Explain)
- A student adds copper carbonate powder to dilute sulfuric acid. The mixture fizzes and the… (4 marks, Explain)