Month: August 2022

Kenya certificate of Secondary Education 2019 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) (b) State the period and group to which Read More …

Chemisry Paper 2 Answers Kenya certificate of Secondary Education 2020 Chemistry paper 2

Kenya certificate of Secondary Education 2020 Chemistry paper 2 1. Crude oil is a mixture of hydrocarbons which are separated by fractional distillation. One of the components obtained contains an alkane A, with eleven carbon atoms. (a) Write the molecular Read More …

Kenya certificate of Secondary Education 2020 Chemistry paper 1 1. Element A has mass number 40 and 21 neutrons. (a) Write the electron arrangement of element A.(1 mark) (b) Give the formula of the compound formed when element A reacts Read More …

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 …

Biology – Paper 2 -2010 1. . a) Respiration (Rej: external respiration/ anaerobic respiration ) Acc: aerobic respiration. b) i) Rise/ increase in thermometer / temperature reading. ii) stored starch/ glucose/ carbohydrates in germination seeds are broken down/ oxidized to Read More …