nakuru district secondary schools trial examination - KCSE Online

……………………………………………………………………………………………………………………………………………………………………………………………….......7 When 6 litres of chlorine gas were completely reacted with element D which is an alkalineearth metal,23.75g of the product were formed. Determine the relative atomic mass of theelement D. (atomic mass of chlorine =35.5 molar gas volume =24 litres) 3marks…………………………………...…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….......…………………………………...……………………………………………………………8 The diagram below shows spots of pure substance A B and C on a chromatography paper.Spot D is that of a mixtureA BC DAfter development A,B,C were found to have moved 4cm, 15cm, 3cm respectively. D. hadseparated into two spots which had moved 3cm and 4cm. On the diagram,(a)(i) show how t he position of all the spots after development.(2marks)(ii) Identify the substances in mixture D. (1mark)..............................................................................................................................................9. The sketch below shows the rate at which substance P is converted to R.. Study it andanswer the questions that followConcentrationRpVisit:4www.kcse-online.info for thousands of free Past papers