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

CH8 - REACTION KINETICS

The Boltzmann distribution for a gas at constant temperature is shown below. If the temperature of the gas is reduced by 10°C the graph changes shape...

2014 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Which compound has the greatest total number of lone pairs of electrons in the valence shells of all of its atoms?

2014 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

A reaction pathway diagram is shown. Which enthalpy change could the diagram not apply to?

2014 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The most common ion-molecule reaction in gas clouds of the Universe is as shown.$$\text{H}_2(g) +...

2014 Summer

MCQ

CH6 - ELECTROCHEMISTRY

The electrolysis of brine using the diaphragm cell is an important industrial process. What happens at the anode?

2014 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Hydrazine, $\text{N}_2\text{H}_4$, is used as a rocket fuel because it reacts with oxygen as shown, producing 'environmentally friendly' gases.$\text{...

2014 Summer

MCQ

CH4 - STATES OF MATTER

A 10.0 cm^3 bubble of an ideal gas is formed on the sea bed where it is at a pressure of 2020 kPa. Just below the sea surface the pressure is 101 kPa ...

2014 Summer

MCQ

CH3 - CHEMICAL BONDING

Four substances have the physical properties shown in [Table_1].Which substance is an ionic solid?

2014 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The enthalpy change of formation of $\text{Mn(NO}_3)_2(\text{s})$ is $-696\text{ kJ mol}^{-1}$.The enthalpy change of formation of $\text{MnO}_2(\text...

2014 Summer

MCQ

CH3 - CHEMICAL BONDING

X is an element in Period 2. In which fluoride is the F−X−F angle the largest?

2014 Summer