Theory

CH6 - ELECTROCHEMISTRY

(a) Describe the observations you would make when concentrated sulfuric acid is added to separate portions of NaCl(s) and NaBr(s). Write an equation f...

2009 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Which conversion involves a reduction of chromium?

2009 Winter

MCQ

CH6 - ELECTROCHEMISTRY

Photochromic glass, used for sunglasses, darkens when exposed to bright light and becomes more transparent again when the light is less bright. The de...

2009 Winter

MCQ

CH6 - ELECTROCHEMISTRY

During electrolysis of brine in a diaphragm cell, chlorine, hydrogen and sodium hydroxide are produced.What is the molar ratio of these products?

2009 Winter

Theory

CH6 - ELECTROCHEMISTRY

(a) The Group IV oxides $\text{CO}_2$ and $\text{SiO}_2$ differ widely in their physical properties. Describe these differences and explain them in te...

2009 Winter

MCQ

CH6 - ELECTROCHEMISTRY

Ammonium nitrate, $\text{NH}_4\text{NO}_3$, can decompose explosively when heated. $$\text{NH}_4\text{NO}_3 \rightarrow \text{N}_2\text{O} + 2\text{H}...

2010 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Which reactions are redox reactions?1. $\text{CaBr}_2 + 2\text{H}_2\text{SO}_4 \rightarrow \text{CaSO}_4 + \text{Br}_2 + \text{SO}_2 + 2\text{H}_2\tex...

2010 Summer

Theory

CH6 - ELECTROCHEMISTRY

Although standard electrode potentials are measured for solutions where the concentrations of ions are $1.0 \text{mol dm}^{-3}$, cells used as sources...

2010 Summer

Theory

CH6 - ELECTROCHEMISTRY

(a) Lead-acid batteries, used in cars, are made up of a number of rechargeable cells in series, and were first developed in 1860. They have the disadv...

2010 Summer

Theory

CH6 - ELECTROCHEMISTRY

(a) Lead-acid batteries, used in cars, are made up of a number of rechargeable cells in series, and were first developed in 1860. They have the disadv...

2010 Summer

MCQ

CH4 - STATES OF MATTER

The temperature of a sample of an inert gas is increased.What effect does this have on the number of molecules with the most probable energy and on th...

2019 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A sample of element X is analysed using mass spectrometry. The mass spectrum obtained is shown.What is the relative atomic mass of this sample of elem...

2019 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A washing powder contains sodium hydrogencarbonate, NaHCO_3, as one of the ingredients.In a titration, a solution containing 1.00 g of this washing po...

2019 Summer

MCQ

CH2 - ATOMIC STRUCTURE

The outermost electron in an atom of neon occupies a particular orbital.Which row shows the relative energy and shape of this orbital?[Table_1: Energy...

2019 Summer

MCQ

CH3 - CHEMICAL BONDING

In which species is there a lone pair of electrons?

2019 Summer

MCQ

CH4 - STATES OF MATTER

When an evacuated tube of volume 400 cm$^3$ is filled with gas at 300 K and 101 kPa, the mass of the tube increases by 0.65 g.Assume the gas behaves a...

2019 Summer

MCQ

CH4 - STATES OF MATTER

Under which conditions will nitrogen behave most like an ideal gas?[Table with conditions]

2019 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Two reactions and their enthalpy changes are shown.2C(s) + 2H$_2$(g) \rightarrow C$_2$H$_4$(g) \hspace{1em} \Delta H^\circ = +52.2 \text{ kJ mol}^{-1}...

2019 Summer

MCQ

CH6 - ELECTROCHEMISTRY

Ethandioic acid, HO$_2$CCO$_2$H, can be oxidised by KMnO$_4$ in dilute sulfuric acid. The products of this reaction are carbon dioxide, water, potassi...

2019 Summer

MCQ

CH7 - EQUILIBRIA

Hydrogen iodide gas decomposes reversibly producing iodine vapour and hydrogen.$$2HI(g) \rightleftharpoons I_2(g) + H_2(g) \quad \Delta H = +12 \text{...

2019 Summer