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

CH8 - REACTION KINETICS

The diagram shows a Boltzmann distribution of molecular energies for a gaseous mixture. The distribution has a peak, labelled P on the diagram. What h...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

Which quantity gives the best indication of the relative strengths of the hydrogen bonds between the molecules in liquid hydrogen halides?

2015 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Use of the Data Booklet is relevant to this question.1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50 g of the carbon combusts t...

2015 Summer

MCQ

CH6 - ELECTROCHEMISTRY

In oxygen difluoride, $\text{OF}_2$, fluorine has an oxidation number of $-1$. $\text{OF}_2$ will react with sulfur dioxide according to the following...

2015 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 below.$pV = nRT$0.96 g of oxygen gas is ...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One mole of phosphorus(V) chloride, $\text{PCl}_5$, is heated to 600 K in a sealed flask of volume 1 dm$^3$. Equilibrium is established and measuremen...

2015 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The standard enthalpy changes of combustion of glucose and ethanol are given as −2820 and −1368 kJ molˉ¹ respectively.Glucose, C$_6$H$_{12}$O$_6...

2015 Summer

MCQ

CH7 - EQUILIBRIA

In which reaction is the underlined substance acting as a base? A. $\text{HNO}_3 + \underline{\text{H}_2\text{SO}_4} \rightarrow \text{H}_2\text{NO}_...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One molecule of haemoglobin, Hb, can bind with four molecules of oxygen according to the following equation. $$\text{Hb(aq)} + 4\text{O}_2\text{(aq)}...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

The double bond between the two carbon atoms in an ethene molecule consists of one \( \sigma \) bond and one \( \pi \) bond.Which orbitals overlap to ...

2015 Summer