Set 1 Chemistry [Paper] 1

Write like a reporter quote by Js Acholiboy Rubangakene Jr Geofrey Page 1 SECTION A-46 MARKS Attempt all questions in this section. 1. Complete the following equations for nuclear reactions . a. 𝑃𝑢94239 + 𝐻𝑒24 ……………… + 𝐴𝑙1327 (01 mark ) b. …………… 𝑇ℎ90234 + α ( 01 mark ) c. 𝐵𝑖83214 𝑃𝑏82206 + … .……… + 3 𝐻𝑒24 (01 mark ) d. 𝐶𝑓98250 + ………… 𝐿𝑤103257 + 4 𝑛01 (01 mark ) 2. The first three successive ionisation energies of element T are 549 , 1064 and 4226KJ/mol . a. Explain the trend in the variation energy of T. (03 mark s) ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………… …………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… b. State the group in the periodic table to which T belongs to. (01 mark ) ………………………………………………………………………………… Write like a reporter quote by Js Acholiboy Rubangakene Jr Geofrey Page 2 3. 10.0cm3 of a hydrocarbon P (C xHy) was exploded in 90.0cm3 of oxygen gas. On cooling to room temperature, the residual gases occupied 70.0cm3, when the residual gases were passed through potassium hydroxide solution, the volume reduced to 40.0cm3. a. (i). Writ e the equation for the reaction between hydrocarbon P and oxygen gas . (01 mark) ………………………………………………………………………………………………… …………………………………………………………………………………………………. (ii).Determine the molecular formula of hydrocarbon P. (03 marks) ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………… …………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………………………………………. b. Write equations to show how hydrocarbon P can be prepared from propan -2-ol. (02 mark s) ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… Write like a reporter quote by Js Acholiboy Rubangakene Jr Geofrey Page 3 4. Complete the equation below and write the suggested mechanism for the reaction. CH3HC=CH2 + Br2 .................................. (04 marks)H2O ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… 5. Thermo energy data for some processes are shown in the table below. Processes …