0620 w10 qp_62

53 %
47 %
Information about 0620 w10 qp_62
Education

Published on March 11, 2014

Author: haiderali91

Source: slideshare.net

READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. CHEMISTRY 0620/62 Paper 6 Alternative to Practical October/November 2010 1 hour Candidates answer on the Question Paper. No Additional Materials are required. UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education This document consists of 13 printed pages and 3 blank pages. [Turn over IB10 11_0620_62/5RP © UCLES 2010 *9445620254* For Examiner’s Use 3 4 5 Total 6 7 1 2

2 0620/62/O/N/10© UCLES 2010 For Examiner’s Use 1 The diagram shows the apparatus used by a student to find the concentration of hydrochloric acid. Sodium hydroxide solution was added to hydrochloric acid until the solution was neutral. hydrochloric acid sodium hydroxide (a) Complete the boxes to name the apparatus used. [3] (b) How could the student tell when the solution was neutral? ........................................................................................................................................... ..................................................................................................................................... [2] [Total: 5]

3 0620/62/O/N/10© UCLES 2010 [Turn over For Examiner’s Use 2 Three bottles of liquids have lost their labels. The liquids are known to be: aqueous potassium chloride, ethanol, sodium hydroxide solution. Outline chemical tests you could use to distinguish between the liquids in the three bottles. liquid test result aqueous potassium chloride .............................................. .............................................. .............................................. .............................................. ethanol .............................................. .............................................. .............................................. .............................................. sodium hydroxide solution .............................................. .............................................. .............................................. .............................................. [Total: 6]

4 0620/62/O/N/10© UCLES 2010 For Examiner’s Use 3 Dilute sulfuric acid was added to zinc carbonate in a conical flask as shown. cotton wool dilute sulfuric acid zinc carbonate balance 129.8 Two experiments were carried out. Experiment 1 The flask was placed on a balance and the mass of the flask and contents recorded every five minutes. The temperature of the sulfuric acid was 30°C. The results have been plotted on the grid. Experiment 2 Experiment 1 was repeated but the temperature of the acid was different. The results are shown in the table. Table of results for Experiment 2 time/minutes 0 5 10 15 20 25 30 mass of flask and contents/g 129.8 128.4 127.0 125.6 124.0 122.6 121.2

5 0620/62/O/N/10© UCLES 2010 [Turn over For Examiner’s Use (a) Plot the results for Experiment 2 on the grid and draw a straight line graph. 130 128 126 124 122 120 0 5 10 15 20 25 30 time/minutes mass of flask and contents/g [3] (b) Why does the mass of the flask and contents decrease? ..................................................................................................................................... [1] (c) Suggest the purpose of the cotton wool. ..................................................................................................................................... [1] (d) (i) In which experiment was the loss of mass of the flask and contents the fastest? .............................................................................................................................. [1] (ii) Compare the temperature of the sulfuric acid in Experiment 2 with Experiment 1. .............................................................................................................................. [1] (e) Use the graph for Experiment 1 to find the time taken for the mass of the flask and contents to decrease to 120g. Indicate clearly on the grid how you obtained your answer. [2] (f) On the grid, sketch the graph you would expect if Experiment 1 was repeated using more concentrated sulfuric acid. [1] [Total: 10]

6 0620/62/O/N/10© UCLES 2010 For Examiner’s Use 4 A student investigated the temperature changes when two different solids, A and B, dissolved in water. Two sets of experiments were carried out. Experiment 1 Using a measuring cylinder, 20cm3 of distilled water was poured into a polystyrene cup. The temperature of the water was measured. 2g of solid A was added to the cup and the mixture was stirred with a thermometer. The temperature of the solution was measured after one minute. 25 20 15 25 20 15 initial temperature final temperature The experiment was repeated using 3g of solid A. 25 20 15 25 20 15 initial temperature final temperature The experiment was repeated using 4g of solid A. 25 20 15 25 20 15 initial temperature final temperature

7 0620/62/O/N/10© UCLES 2010 [Turn over For Examiner’s Use The experiment was repeated using 6g of solid A. 25 20 15 25 20 15 initial temperature final temperature (a) Use the thermometer diagrams for Experiment 1 to record the initial and final temperatures in Table 4.1. Table 4.1 mass of solid A/g initial temperature/°C final temperature/°C 2 3 4 6 [3]

8 0620/62/O/N/10© UCLES 2010 For Examiner’s Use Experiment 2 Experiment 1 was repeated using 2g, 3g and 4g of solid B respectively. 2g of B 30 25 20 30 25 20 initial temperature final temperature 3g of B 30 25 20 30 25 20 initial temperature final temperature 4g of B 30 25 20 30 25 20 initial temperature final temperature (b) Use the thermometer diagrams for Experiment 2 to record the initial and final temperatures in Table 4.2. Table 4.2 mass of solid B/g initial temperature/°C final temperature/°C 2 3 4 [2]

9 0620/62/O/N/10© UCLES 2010 [Turn over For Examiner’s Use (c) Plot the results of the experiments on the grid below. Draw two best-fit straight line graphs. Clearly label your graphs. 0 21 4 63 5 mass of solid added/g final temperature of solution/°C 40 30 20 10 0 [6] (d) (i) Use your graph to estimate the temperature of the reaction mixture if 6g of solid B was added to 20cm3 of water. Show clearly on the grid how you worked out your answer. .............................................................................................................................. [2]

10 0620/62/O/N/10© UCLES 2010 For Examiner’s Use (ii) From your graph work out the temperature of the reaction mixture if 5 g of solid A was added to 20cm3 of water. Show clearly on the graph how you worked out your answer. .............................................................................................................................. [2] (e) What type of chemical reaction occurred when solid A dissolved in water? ..................................................................................................................................... [1] (f) Explain how the temperature changes would differ in the experiments if 40 cm3 of water was used. ........................................................................................................................................... ........................................................................................................................................... ..................................................................................................................................... [2] (g) Predict the effect of using lumps of solid B in Experiment 2. Explain your answer. ........................................................................................................................................... ..................................................................................................................................... [2] [Total: 20]

11 0620/62/O/N/10© UCLES 2010 [Turn over For Examiner’s Use 5 A mixture of two solids, C and D, was analysed. Solid C was lead nitrate, which is water-soluble. Solid D was insoluble. The tests on C and D, and some of the observations, are in the following table. Complete the observations in the table. tests observations Water was added to the mixture in a boiling tube and shaken. The contents of the tube were filtered. tests on filtrate (a) To about 1cm3 of the solution, a few drops of dilute nitric acid and about 1 cm3 of aqueous potassium iodide was added. (b) To about 1 cm3 of the solution, sodium hydroxide solution and aluminium powder were added. The mixture was heated. Any gases given off were tested with damp pH indicator paper. ................................................................ [2] ...................................................................... ...................................................................... ................................................................ [3] tests on residue (c) Dilute hydrochloric acid was added to the residue. The gas given off was tested with limewater. The solution was divided into two equal portions. (i) To the first portion, aqueous sodium hydroxide was added a little at a time until in excess. (ii) To the second portion, aqueous ammonia solution was added a little at a time until in excess. rapid effervescence, limewater turns milky white precipitate, soluble in excess aqueous sodium hydroxide white precipitate, soluble in excess aqueous ammonia solution (d) Identify the gas given off in test (c). ..................................................................................................................................... [1] (e) Identify solid D. ..................................................................................................................................... [2] [Total: 8]

12 0620/62/O/N/10© UCLES 2010 For Examiner’s Use 6 The apparatus below was used to deposit a thin layer of chromium on a steel knife. The knife was cleaned carefully and all grease removed before the process started. metal A steel knife solution of salt B (a) What is the name of the process when metal objects are coated with other metals? ..................................................................................................................................... [1] (b) (i) Suggest the identity of metal A. .............................................................................................................................. [1] (ii) Suggest the name of salt B. .............................................................................................................................. [1] (c) Give two reasons why steel knives are coated with chromium. 1. ....................................................................................................................................... 2. ................................................................................................................................. [2] [Total: 5]

13 0620/62/O/N/10© UCLES 2010 For Examiner’s Use 7 Iron rusts when in contact with air and water. You are provided with iron nails and three different samples of water: tap water, sea water, distilled water. Plan an investigation to find out which sample of water causes iron to rust the fastest. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. ..............................................................................................................................................[6] [Total: 6]

14 0620/62/O/N/10 BLANK PAGE © UCLES 2010

15 0620/62/O/N/10 BLANK PAGE © UCLES 2010

0620/62/O/N/10 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. 16 BLANK PAGE © UCLES 2010

Add a comment

Related presentations

Related pages

11 0620 62 5RP - papers.xtremepapers.com

CHEMISTRY 0620/62 Paper 6 Alternative to Practical October/November 2010 1 hour Candidates answer on the Question Paper. No Additional Materials are required.
Read more

0620 w10 qp_62 - Education - documents.tips

0620 w10 qp_62. by king-ali. on Jul 21, 2015. Report Category: Education
Read more

0620 w10 qp_63 - Education - documents.tips

0620 w10 qp_63. by king-ali. on Jul 15, 2015. Report Category: Education
Read more

Papers./CIE/Cambridge IGCSE/Chemistry (0620 ...

0620_w10_qp_62.pdf: 205.9 KB: 0620_w10_qp_63.pdf: 205.9 KB: 0620_w11_er.pdf: 2.8 MB: 0620_w11_gt.pdf: 142.9 KB: 0620_w11_ir_51.pdf: 72.9 KB: 0620_w11_ir_52 ...
Read more

0620 Chemistry Cambridge IGCSE Past Papers 2010 | Online ...

0620 Chemistry Cambridge IGCSE Past Papers 2010. Download updated Cambridge IGCSE Chemistry 0620 Past Papers, ... 0620_w10_qp_62.pdf; 0620_w10_qp_63.pdf ...
Read more

PapaCambridge CIE Resources http://pastpapers ...

0620_w10_ms_61.pdf 130.55KB 2015-09-28 00:53:25 . 0620_w10_ms_62. pdf 130.78KB 2015-09-28 00:53 ...
Read more

0620_w10_qp_62 - Documents - docslide.us

×Close Share 0620_w10_qp_62. Embed ...
Read more

Chapter 10tif - Scribd

Chapter 10tif. by ManP13. 1.0K views. Embed. Download. Read on Scribd mobile: iPhone, iPad and Android. ... 0620_w10_qp_62. MCQ in Chromatograpgy. 142 Exam ...
Read more