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

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Solutions containing chlorate(I) ions are used as household bleaches and disinfectants. These solutions decompose on heating as shown.$$3 ext{ClO}^- ...

2013 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A mixture of 10 cm³ of methane and 10 cm³ of ethane was sparked with an excess of oxygen. After cooling to room temperature, the residual gas was pa...

2013 Summer

MCQ

CH6 - ELECTROCHEMISTRY

The diagram shows an electrolytic cell for the extraction of aluminium. Which statement is correct?

2013 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Use of the Data Booklet is relevant to this question.The elements radon (Rn), francium (Fr) and radium (Ra) have proton numbers 86, 87 and 88 respecti...

2013 Summer

MCQ

CH2 - ATOMIC STRUCTURE

In which species are the numbers of protons, neutrons and electrons all different?

2013 Summer

MCQ

CH7 - EQUILIBRIA

An experiment is set up to measure the rate of hydrolysis of ethyl ethanoate. $$ \text{CH}_3\text{CO}_2\text{C}_2\text{H}_5 + \text{H}_2\text{O} \righ...

2013 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The reaction pathway for a reversible reaction is shown below. Which statement is correct?

2013 Summer

MCQ

CH8 - REACTION KINETICS

Why does the rate of a gaseous reaction increase when the pressure is increased at a constant temperature?

2013 Summer

MCQ

CH4 - STATES OF MATTER

Which would behave the least like an ideal gas at room temperature?

2013 Summer

MCQ

CH4 - STATES OF MATTER

The general gas equation can be used to calculate the $M_r$ value of a gas. For a sample of a gas of mass $mg$, which expression will give the value o...

2013 Summer