Which of the following reactions will produce hydrogen? Acid plus alkaliMetal plus oxygenMetal plus acidMetal carbonate plus acid2What is the test for hydrogen gas?Turns limewater cloudy whiteBleaches damp blue litmus paperRelights a glowing splintA lit splint produces a squeaky pop3The test for oxygen is based on the fact that fuels need oxygen to burn. What fuel is used in this test? Litmus paperMethaneLimewaterA glowing splint4Which of the following reactions will produce carbon dioxide? Metal carbonate plus acidMetal plus acidAcid plus alkaliMetal plus oxygen5What happens when carbon dioxide is bubbled into limewater? It turns from colourless to cloudy whiteIt turns from cloudy white to colourlessIt turns from colourless to blueIt produces a flame6What is the test for chlorine gas?Turns damp red litmus paper blueTurns limewater redBleaches damp blue litmus paperBurns with a lilac flame

What are the products of a reaction involving an acid and a carbonate?Group of answer choicesSalt + oxygen + waterSalt + carbon dioxide + waterSalt + carbon + waterSalt + hydrogen gas

Which of the following would be produced in a combustion reaction?A.A hydrocarbonB.OxygenC.HydrogenD.Carbon dioxideSUBMITarrow_backPREVIOUS

A student found this information about hydrogen.(a) (i) The student repeated Boyle’s experiment using iron and dilute sulfuric acidState two observations that he could have made1.2.(iii) Complete the word equation for this reaction.Iron + sulfuric acid → +(b) Balance the equation for the complete combustion of hydrogen.H2 + O2 → H2O(c) To show that the liquid produced by burning hydrogen was pure water, a student carried out achemical test and a physical test.(i) The chemical test involves adding a few drops of the liquid to a sample of anhydrous copper(II) sulfate. State the colour change observed.Initial colourFinal colour(ii) Place a cross (  ) in one box to show the formula of the compound formed in this chemical test. A Cu(OH ) 2 B CuSO4 C CuSO4H2O D CuSO4 . 5H2O(iii) The physical test involved measuring a property of the liquid.State a suitable physical property and give the value for pure water.Physical propertyValue(c) (i) suggest what property of hydrogen makes it suitable for filling balloons.(iii) Helium is now used instead of hydrogen to fill balloons.State the property of helium that makes it more suitable than hydrogen for filling balloons.(d) Write an equation, including state symbols, to show the process that occurs when hydrogen isliquefied.Ammonium chloride contains oppositely charged ions(a) State the formula of each ionPositive ionNegative ion(b) (i) Describe a chemical test to show that a substance contains ammonium ions.(ii) describe a chemical test to show that a substance contains chloride ions.(c) Ammonium chloride decomposes when heated:NH4CI(s) ⇄ NH3(g) + HCI(g)What does the ⇄ symbol indicate about the reaction?(d) The reaction between ammonia and hydrogen chloride can be used to illustrate diffusion withthe following apparatus.After a few minutes, a white solid appears inside the tube(i) Identify the white solid(ii) What does the diagram show about the speed of the ammonia molecules compared to thespeed of the hydrogen chloride molecules?(e) State the main hazard when using concentrated hydrochloric acid in the experiment in (d)suggest one precaution you could use to minimise this hazard.HazardPrecaution

A chemical reaction is shown below.​​Fe + H2O → Fe3O4 + H2​​Unit 2 Review​​What are the products in the equation?​​A Fe3O4 only​​B Fe only​​C Fe and H2O​​D Fe3O4 and H2​​13 Which of the following occurrences indicates that a chemical reaction has taken place?​​A An odor is produced by burning a sugar cube.​​B A puddle is produced by melting an ice cube.​​C A loud noise is produced by crushing a can.​​D A shard of glass is produced by breaking a bottle.​​Critical Thinking​​Answer the following questions in the space provided.​​14 List three properties of metals that nonmetals typically do not have.​​Describe where metals and nonmetals are found on the periodic table.​​What is the name for elements that have some properties of metals and some properties of nonmetals?​

What is the only by-product of burning Hydrogen fuel?*Carbon monoxideMethaneWaterCO2