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

CH2 - ATOMIC STRUCTURE

In which species does the underlined atom have an incomplete outer shell?

2012 Summer

MCQ

CH7 - EQUILIBRIA

Ammonia is manufactured by the Haber Process, in an exothermic reaction. Assuming that the amount of catalyst remains constant, which change will not ...

2012 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The equation for a reaction is shown.$\text{H}_2(g) + \frac{1}{2}\text{O}_2(g) \rightarrow \text{H}_2\text{O}(l) ; \Delta H = x \text{ kJ mol}^{-1}$Wh...

2012 Summer

MCQ

CH2 - ATOMIC STRUCTURE

The value of the second ionisation energy of calcium is 1150 kJ mol^{-1}. Which equation correctly represents this statement?

2012 Summer

MCQ

CH3 - CHEMICAL BONDING

Two conversions are outlined below.$$\text{NH}_4^+ \rightarrow \text{NH}_3$$$$\text{C}_2\text{H}_4 \rightarrow \text{C}_2\text{H}_6$$What similar feat...

2012 Summer

MCQ

CH4 - STATES OF MATTER

Use of the Data Booklet is relevant to this question.The gas laws can be summarised in the ideal gas equation.$pV = nRT$0.56 g of ethene gas is contai...

2012 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Propanone has the molecular formula $C_3H_6O$.The enthalpy change of combustion of hydrogen is $-286\text{ kJ mol}^{-1}$.The enthalpy change of combus...

2012 Summer

MCQ

CH4 - STATES OF MATTER

Under which set of conditions is a gas most likely to behave ideally? [Table_1]

2012 Summer

MCQ

CH7 - EQUILIBRIA

Two moles of compound P were placed in a vessel. The compound P was partly decomposed by heating. A dynamic equilibrium between chemicals P, Q and R w...

2012 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The oxide of titanium, TiO₂, is used as a ‘whitener’ in toothpaste. It is obtained from the ore iron(II) titanate, FeTiO₃.What is the change, ...

2012 Summer