Set 4 U C E Chemistry Paper 1 2026 Standard Exam

@2026 𝑈.𝐶.𝐸 𝐶ℎ𝑒𝑚𝑖𝑠𝑡𝑟𝑦 𝑆𝑒𝑟𝑖𝑒𝑠 𝐵𝑦 𝑊𝑎𝑠𝑎𝑘𝑖𝑛𝑎 𝐽𝑢𝑙𝑖𝑢𝑠 𝑀.0787093081 1 545/1 CHEMISTRY Paper 1 2026 2 hours SET 4 Uganda Certificate of Education CHEMISTRY Paper 1 2 hours INSTRUCTIONS TO CANDIDATES: This paper consists of two Sections; A and B. It has six examination items. Section A has two compulsory items. Section B has two Parts; I and II. Answer one item from each part. Answer four items in all. Answers to Section A must be written in the spaces provided while those of section B must be written on the answer booklet(s) provided. Any additional item(s) answered will not be scored. Use where necessary; Ca = 40; Mg=24; C = 12, O = 16; 1 mole of a gas occupies 22.4 dm³ at s.t.p. Item No. Basic Code Weighted Score Scores’ Initials 1 T D E 2 C X I 3/4 P S B 5/6 N M Be Total Weighted Score Name: …………………………………………………………………………………. Signature …………………….. For Scorers’ Use Only Total Weighted Score Initials @2026 𝑈.𝐶.𝐸 𝐶ℎ𝑒𝑚𝑖𝑠𝑡𝑟𝑦 𝑆𝑒𝑟𝑖𝑒𝑠 𝐵𝑦 𝑊𝑎𝑠𝑎𝑘𝑖𝑛𝑎 𝐽𝑢𝑙𝑖𝑢𝑠 𝑀.0787093081 2 SECTION A Answer all items in this section Item 1 During the mid-20th century, the Chernobyl region in Ukraine experienced a major nuclear accident at a power plant, releasing large amounts of radioactive material into the environment, as shown in Figure 1. Fig 1. Radioactive contamination at Chernobyl The released nuclear energy caused long-term environmental and health effects, including contamination of land. Interestingly, the nuclear energy involved can also be harnessed for beneficial purposes, such as medical treatments. Task: As a learner of Chemistry; (a) Identify the type of nuclear reaction and explain how it works __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ (b) Suggest other uses of this form of energy __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ (c) Explain other dangers associated with this form of energy and suggest mitigation …