Month: August 2022

 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 …

Chemistry Paper 2 (233/2) 1 The flow chart below shows some of the processes involved in large scale production of sulphuric (VI) acid. Use it to answer the questions that follow. (a) Describe how oxygen is obtained from air on Read More …

Chemistry Paper 1 (233/1) 1 (a) What name is given to the process by which alcohol is formed from a carbohydrate? (1 mark) (b) Explain why the solubility of ethane in water is lower than that of ethanol. (2 marks) Read More …