Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Copper and titanium are each used with aluminium to make alloys which are light, strong and resistant to corrosion. Aluminium, $Al$, is in the third p...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Complete the electronic configuration of aluminium and of titanium, proton number 22.\[\begin{array}{|c|c|} \hline \text{Al} & 1s^2 \\ \hline \tex...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

You are provided with the following.FA 1 is 0.15 mol dm$^{-3}$ sodium thiosulfate, Na$_2$S$_2$O$_3$.FA 2 is aqueous copper(II) sulfate.You are also pr...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

You are to investigate how the rate of formation of sulfur varies with the concentration of sodium thiosulfate, Na₂S₂O₃, in the reaction below.N...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Carry out the following tests. Record your observations in the spaces provided in the table.[Table_1]To 1 cm depth of solution in a test-tube add ...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

You are provided with the following.FB 1 is 0.023 mol dm−3 potassium manganate(VII), KMnO4.FB 2 is aqueous ethanedioic acid, H2C2O4, made by dissolv...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Reaction of FB 4, Na2CO3, with an excess of 3.0 mol dm^-3 hydrochloric acidRead through the following instructions carefully before starting the e...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

FB 6 and FB 7 each contain one of the following sodium halides, NaCl, NaBr, NaI. (a) Place half of the solid FB 6 provided in a test-tube. Half fill t...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Metals play a vital part in biochemical systems. In this question you need to consider why some metals are essential to life, whilst others are toxic....

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Spider silk is a natural polymer which has an exceptional strength for its weight. *Kevlar* is a man-made polymer designed to have similar propert...

2009 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Which species contains the same number of neutrons as $^{14}_{6}\text{C}$ and the same number of electrons as $^{23}_{11}\text{Na}^+$?

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

Which process has the largest enthalpy change per mole?

2024 Spring

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Which sodium compound contains 74.2% by mass of sodium?

2024 Spring

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

What is the maximum volume of sulfur dioxide gas measured at room conditions produced from burning 100\,\text{dm}^3 of diesel fuel containing 0.834\,\...

2024 Spring

MCQ

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Which row shows the correct number of covalent bonds in a molecule of methylpropene? [Table_1]

2024 Spring

MCQ

CH3 - CHEMICAL BONDING

Aluminium chloride exists as $\text{Al}_2\text{Cl}_6$ molecules at room temperature. When heated to a high temperature, $\text{AlCl}_3$ molecules are ...

2024 Spring

MCQ

CH4 - STATES OF MATTER

The table shows the physical properties of four substances. Which substance has a giant covalent structure?

2024 Spring

MCQ

CH4 - STATES OF MATTER

At room temperature and pressure, $\text{H}_2\text{O}$ is a liquid and $\text{H}_2\text{S}$ is a gas.What is the reason for this difference of state?

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change for a reaction can be calculated from values of:• enthalpies of formation, $\Delta H^{\circ}_f$• enthalpies of combustio...

2024 Spring

MCQ

CH5 - CHEMICAL ENERGETICS

Which reaction has an enthalpy change equal to the standard enthalpy change of formation of propane?

2024 Spring