Theory

CH4 - STATES OF MATTER

The elements carbon and silicon are both in Group IV of the Periodic Table. Carbon is the second most abundant element by mass in the human body and s...

2009 Winter

Theory

CH4 - STATES OF MATTER

1. Conventional batteries produce electrons through a chemical reaction between electrolyte and metal.2. Chemical reaction in the ‘paper’ battery ...

2009 Winter

MCQ

CH4 - STATES OF MATTER

Which gas closely approaches ideal behaviour at room temperature and pressure?

2010 Summer

MCQ

CH4 - STATES OF MATTER

Which mass of gas would occupy a volume of 3 dm$^3$ at 25°C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm$^3$ at 25°C and 1 atmosphere pre...

2010 Summer

MCQ

CH4 - STATES OF MATTER

Which diagrams represent part of a giant molecular structure? 1. [Image with C] 2. [Image with C] 3. [Image with Na and Cl]

2010 Summer

MCQ

CH4 - STATES OF MATTER

Which diagrams represent part of a giant molecular structure?

2010 Summer

Theory

CH4 - STATES OF MATTER

Copper, proton number 29, and argon, proton number 18, are elements which have different physical and chemical properties. In the solid state, each el...

2010 Summer

Theory

CH4 - STATES OF MATTER

An organic compound, E, has the following composition by mass: C, 48.7%; H, 8.1%; O, 43.2%. (a) Calculate the empirical formula of E. (b) When vapo...

2010 Summer

Theory

CH4 - STATES OF MATTER

A possible source of energy for the road vehicles of the future is hydrogen. One of the problems still to be solved is the storage of the hydrogen in ...

2010 Winter

Theory

CH4 - STATES OF MATTER

A possible source of energy for the road vehicles of the future is hydrogen. One of the problems still to be solved is the storage of the hydrogen in ...

2010 Winter

Theory

CH4 - STATES OF MATTER

The rate of chemical reactions is affected by changes in temperature and pressure.(a) (i) Draw a curve on the axes to show the Boltzmann distribution ...

2021 Spring

Theory

CH11 - GROUP 17

Chlorine, $Cl_2$, is a reactive yellow-green gas. It is a strong oxidising agent.(a) State how $Cl_2$ is used in water purification......................

2021 Spring

Theory

CH5 - CHEMICAL ENERGETICS

Compounds P, Q and R have all been found in the atmosphere of one of Saturn’s moons. P: N≡C—C≡C—C≡C—N Q: H—C≡C—C≡N R: ![Cyclopr...

2021 Spring

Theory

CH3 - CHEMICAL BONDING

Hydroxyethanal, HOCH$_2$CHO, has been observed in dust clouds near the centre of our galaxy.hydroxyethanal(a) Predict the bond angles labelled x and y...

2021 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

(a) The most common oxidation states of cobalt are +2 and +3.Complete the electronic configurations of the following free ions.• Co2+ [Ar] .........

2021 Spring

Theory

CH6 - ELECTROCHEMISTRY

(a) Iron(II) compounds are generally only stable in neutral, non-oxidising conditions.It is difficult to determine the lattice energy of FeO experimen...

2021 Spring

Theory

CH3 - CHEMICAL BONDING

Iodates are compounds that contain the $\text{IO}_3^{-}$ anion.(a) The $\text{IO}_3^{-}$ anion is shown.Explain, with reference to the qualitative mod...

2021 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

The transition elements are able to form stable complexes with a wide range of molecules and ions.(a) State the meaning of transition element............

2021 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

(a) Carboplatin and satraplatin are used as anticancer drugs instead of cisplatin. (i) Describe the action of cisplatin as an anticancer drug. ........

2021 Spring

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Fumaric acid is a naturally occurring dicarboxylic acid.\\[ \text{fumuric acid} \] \[ \text{HO}_2\text{C}=\text{CH}-\text{CH}=\text{CO}_2\text{H} \](a...

2021 Spring