kericho district joint kcse trial examination-2012 - KCSE Online

( ½ mark) ( ½ mark)b) Place a spatula end-full of solid H in a boiling tube and add about 15 cm 3 of distilledwater and shake well. Divide the solution into three portionsi) To portion one, add sodium hydroxide solution drop wise until in excess. Warmthe mixture gently and test the gas(es) evolved with litmus papers.ObservationsInferences( 2 marks) ( 1 mark)Observationsii) To portion two, add five drops of lead (ii) nitrate. Warm the mixture.Inferences6Visit: www.kcse-online.info for exam & mock papers

( 1 mark) ( 1 mark)iii) To portion three, add three drops of Barium chloride solution, followed by 5 cm 3hydrochloric acid solutionObservationsInferences( 1 mark) ( ½ mark)aII) You are provided with solid K.You are required to carry out the tests shown. Write down your observations andinferences as per the table belowTest Observations InferencesTake a spatula end-full of solid X ina clean boiling tube.Shake well.7Visit: www.kcse-online.info for exam & mock papers

Divide the resultant mixture intothree portionsTo the first portion, add 3 drops ofacidified potassium manganate(vii)(1 mark) (1 mark)cTo the second portion, add 4 dropsof bromine water(1 mark) (1 mark)dTo the third portion add a few dropsof universal indicator and determinethe PH of the resulting solution(1 mark) (1 mark)(1 mark) (1 mark)8Visit: www.kcse-online.info for exam & mock papers

9Visit: www.kcse-online.info for exam & mock papersEnd