Month: August 2022

Kenya Certificate of Secondary Education 2017 Chemistry paper 1 1. Table 1 shows the atomic numbers and the first ionisation energies of three elements. The letters are not actual symbols of the elements. Use it to answer the questions that Read More …

Practical 2018 Chemistry paper 3 1. You are provided with: • 0.30 g solid A, magnesium metal • Hydrochloric acid, solution B • 0.15 sodium carbonate, solution C • Methyl orange indicator You are required to determine the: • Enthalpy Read More …

2018 Chemistry paper 2 1. The diagram in figure I shows some natural and industrial processes. Study it and answer the questions that follows (a) Identify the processes labelled: (2 marks) A — Fermentation B — Dehydration C — Addition Read More …

2018 Chemistry paper 2 1. The diagram in figure I shows some natural and industrial processes. Study it and answer the questions that follows (a) Identify the processes labelled: (2 marks) A………………. B………………. C………………. D………………. (b) State the reagents and Read More …

2018 Chemistry paper 1 1. (a) Define a soluble base. (1 mark) A soluble base is a substance that dissociates in water to produce hydroxide ions as the only negative ions. (b) Aqueous solutions of 2M ethanoic acid and 2M Read More …

 Biology Paper 2 Answer all the questions in the spaces provided. 1. In an experiment to investigate the effect of Sodium chloride on the growth rate in a spinach seedling. seeds were treated with different of sodium chloride. The results Read More …

 Chemistry paper 1 1. An atom of element A has mass number 39 and 19 protons. (a) Write the electron arrangements of the atom (1 mark)   2.8.8.1(b) State the period and group to which element A belongs Group 1(½ mark) Read More …

2020 Chemistry paper 2

KCSE Past Papers 2021 Chemistry Paper 1 (233/1) KCSE Past Papers 2021 Chemistry Paper 2 (233/2) KCSE Past Papers 2021 Chemistry Paper 3 (233/3) KCSE Past Papers 2020 Chemistry Paper 1 (233/1) KCSE Past Papers 2020 Chemistry Paper 2 (233/2) Read More …

 Chemistry Paper 3 (233/3) 1 You are provided with: – 1.6Og of solid A. a dibasic acid. – Solution B containing 4.75g per litre of salt B. – Aqueous sodium hydroxide. solution C. – Phenolphthalein indicator. You are required to Read More …