AISS 2023 Sec 3 Express WA1 Question Paper

[Turn over AHMAD IBRAHIM SECONDARY SCHOOL TERM 1 WEIGHTED ASSESSMENT 1 2023 SECONDARY 3 EXPRESSName:Class:Register No.:CHEMISTRY 60922 March 202345 minutes READ THESE INSTRUCTIONS FIRSTDo not open this booklet until you are told to do so. Write down your name, class and register number in the spaces at the top of this page.This paper consists of TWO sections.Section A – 10 marksSection B – 20 marksSection A consists of 10 multiple choice questions. Answer ALL questions. For each question, four suggested answers are given. You are to choose the most appropriate one and indicate it in the boxes provided.Answer ALL questions in Section B in the spaces provided on the Question Paper.The number of marks is given in brackets [ ] at the end of each question or part question. The use of calculator is allowed in this examination. A copy of Periodic Table is provided at the last page.FOR EXAMINER’S USESection A/ 10Section B/ 20TOTAL/ 30This question paper consists of 15 printed pages

2 AISS WA1 3E/6092/2023 Section AQns12345678910AnsBBCAnswer ALL questions and write your answers in the boxes below.1Which apparatus can be used for the accurate measurement of 25.0 cm3 of a solution?I 25 cm3 pipetteII 50 cm3 buretteIII 50 cm3 beakerIV 50 cm3 measuring cylinderAII onlyBI and II onlyCII and III onlyDII and IV only

3 AISS WA1 3E/6092/2023[Turn over 2Which apparatus cannot be used to collect a gas that is denser than air and is insoluble in water?A B C D 3Which method is used to obtain copper(II) chloride crystals from a solution of copper(II) chloride?AevaporationBdistillationCcrystallisationDpaper chromatography

4 AISS WA1 3E/6092/2023 4Some properties of gas X, gas Y and concentrated sulfuric acid are given in the table below.substancepropertiesgas Xinsoluble in waterneutral gasgas Yvery soluble in wateracidic gasconcentrated sulfuric acidvery corrosivepungent, colourless liquidpowerful dehydrating agentWhich diagram shows the correct set-up to collect pure, dry sample of gas X from a sample of damp gas X contaminated with gas Y?A Bdamp gas Xand gas Ygas Xconcentrated sulfuric acidgas Xdamp gas X and gas Ywaterconcentrated sulfuric acidC Ddamp gas Xand gas Ygas Xconcentrated sulfuric aciddamp gas X and gas Yconcentrated sulfuric acidwatergas X

5 AISS WA1 3E/6092/2023[Turn over 5Ink X was suspected to contain one or more of the dyes P, R and S.Spots of each dye were placed on the starting lines of two pieces of chromatography paper. One paper was placed into water (chromatogram 1) and the other with ethanol (chromatogram 2). What is the identity of X? AR onlyBP onlyCeither P or R onlyDP, R and S6A sample of a compound, allyl isocyanide, was made from an experiment. This compound has been patented as a non-lethal weapon as it has an extremely penetrating and foul smell.Which property of the compound can be used to check its purity?AcolourBpH value Cboiling pointDsolubility in water

6 AISS WA1 3E/6092/2023 7Dry ice is solid carbon dioxide which sublimes readily at room temperature.Which statement best describes what happens when dry ice sublimes?AParticles start to become bigger.BStationary particles start to vibrate vigorously.CDistance between particles increases. DVibrating particles start to slide over each other.8Two gas jars containing separate samples of bromine gas and oxygen gas are separated by the cover plate as shown in the diagram. The cover plate is then removed from the gas jars. After several days, the colour of the gas is the same in both jars as shown below. oxygenbrominecover plateafterbefore Which statement explains this change? ABromine gas is denser than oxygen gas.BBromine and oxygen molecules are in random motion.CBromine and oxygen molecules diffuse at the same rate. DBromine and oxygen molecules reacted with each other.

7 AISS WA1 3E/6092/2023[Turn over 9Methylamine, CH3NH2 (Mr = 31), and hydrogen chloride, HCl (Mr = 36.5) are both gases which are soluble in water. The gases react together to form a white solid, methylammonium chloride.An experiment to demonstrate rates of diffusion is being set up as seen below. At which location, A, B, C or D, will the white solid be seen?cotton woolsoaked in concentratedhydrochloric acid solutioncotton woolsoaked in concentratedmethylamine solutionDCBA 10 gas BThe diagram shows an experiment on diffusion.porous potbeakerWwatergas A The water level does not move and remains at point W.Which statement explains this?AGas A is unreactive.BGases A and B are insoluble in water.CGases A and B have equal molecular masses.DGas B has a larger molecular mass than gas A.

8 AISS WA1 3E/6092/2023 Section BAnswer ALL questions in the spaces provided.1The graph below shows the cooling curve of ethanol. EDCBA (a)Which region, A, B, C, D or E, shows ethanol in both liquid and gaseous state?…………………………………………………………………………………………… [1](b)Draw the arrangement of particles at 80 C.[1](c)Describe how the arrangement and movement of particles in ethanol changes when its temperature decreases from 0 C to −120 C.………………………………………………………………………………………………….………………………………………………………………………………………………….………………………………………………………………………………………………….

9 AISS WA1 3E/6092/2023[Turn over …………………………………………………………………………………………… [2](d)Explain, in terms of the kinetic particle theory, what happens to the particles of ethanol as it is heated from −100 C to 100 C.………………………………………………………………………………………………….………………………………………………………………………………………………….………………………………………………………………………………………………….………………………………………………………………………………………………….………………………………………………………………………………………………….…………………………………………………………………………………………… [3](e)In a practical assessment, students were tasked to design and conduct an experiment to separate a mixture of dichloromethane, ethanol and water. These are miscible liquids. Upon collecting her sample, Emily noticed pieces of plastic in her sample.(i)Draw a labelled diagram, indicating the apparatus and substances, to show how Emily can remove the pieces of plastic from her sample.

10 AISS WA1 3E/6092/2023 [2] After removing the plastic pieces from her sample, Emily set up the apparatus as shown below to separate the mixture. distillatewater inwater outthermometermixture The boiling points of the components in a mixture are shown below.componentboiling point / °Cdichloromethane41