Theory

CH17 - ORGANIC CHEMISTRY

A compound has the formula CH₃CH₂CH=CH₂. Which row in the table shows the type of compound and the colour change when aqueous bromine is added?...

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

The diagram shows an industrial process. Substance M is one of the substances produced by this process and is used as aircraft fuel. What is this pr...

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

The structures of three compounds are shown.Why do these substances all belong to the same homologous series?A They all contain an even number of carb...

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

Which bond is not in a molecule of ethanoic acid?A) C–OB) C=OC) C=CD) O–H

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

A compound has the formula CH3CH2CH=CH2.Which row in the table shows the type of compound and the colour change when aqueous bromine is added?[Table_1...

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

The structures of three compounds are shown.Why do these substances all belong to the same homologous series?A They all contain an even number of carb...

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

Which bond is not in a molecule of ethanoic acid?A. C–OB. C=OC. C=CD. O–H

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

The diagram shows an industrial process. Substance M is one of the substances produced by this process and is used as aircraft fuel. What is this pr...

2009 Summer

Theory

CH17 - ORGANIC CHEMISTRY

The apparatus shows an experiment used to test gas X.The bromine solution quickly becomes colourless.What is the structure of gas X?A H−C−HB H |...

2009 Winter

Theory

CH17 - ORGANIC CHEMISTRY

Which statement about petroleum is not correct?A. It can be separated into useful substances by fractional distillation.B. It consists mainly of hydro...

2009 Winter

Theory

CH1 - STATES OF MATTER

Which diagram shows the process of diffusion?[Image_1: A, B, C, D diagrams with different atoms]

2012 Summer

Theory

CH2 - SEPARATING SUBSTANCES

Which method is most suitable to obtain zinc carbonate from a suspension of zinc carbonate in water?A) crystallisationB) distillationC) evaporationD) ...

2012 Summer

Theory

CH10 - THE SPEED OF A REACTION

A student investigates how the concentration of an acid affects the speed of reaction with a 0.5 g mass of magnesium at 30°C.The student has a beaker...

2012 Summer

Theory

CH3 - ATOMS AND ELEMENTS

An element Y has the proton number 18.The next element in the Periodic Table is an element Z.Which statement is correct?A. Element Z has one more elec...

2012 Summer

Theory

CH3 - ATOMS AND ELEMENTS

Which atom has twice as many neutrons as protons?A: $^1_1\text{H}$B: $^2_1\text{H}$C: $^3_1\text{H}$D: $^4_2\text{He}$

2012 Summer

Theory

CH4 - ATOMS COMBINING

Which is a simple covalent molecule?[Table_1]

2012 Summer

Theory

CH4 - ATOMS COMBINING

The electronic structures of atoms P and Q are shown.P and Q react to form an ionic compound.What is the formula of this compound?A. PQ2B. P2QC. P2Q6D...

2012 Summer

Theory

CH4 - ATOMS COMBINING

The diagrams show the structures of two forms, P and Q, of a solid element.What are suitable uses of P and Q, based on their structures?[Table_1]| |...

2012 Summer

Theory

CH5 - REACTING MASSES AND CHEMICAL EQUATIONS

The equation for the reaction between magnesium and dilute sulfuric acid is shown.$$\text{Mg } + \text{ H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \t...

2012 Summer

Theory

CH1 - STATES OF MATTER

Winston Churchill, a British Prime Minister, had his false teeth electroplated with gold. The teeth were coated with a thin layer of carbon and were t...

2012 Summer