Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the following reaction scheme which starts with ethanol.In each empty box, write the structural formula of the organic compound that woul...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) When F is formed in step I no other compound is produced. Suggest a structural formula for F, which contains one –OH group.(b) Compound G has tw...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the following reaction scheme which starts with propanone. In each empty box, write the structural formula of the organic compound that w...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

Ethanol, CH$_3$CHO, can be converted into compound U by the following sequence.(a) When T is formed in step I, no other compound is produced.Suggest a...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

A large number of organic compounds are soluble in both water and non-aqueous solvents such as hexane. If such a compound is shaken with a mixture of ...

2009 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

The structural formulae of six different compounds, A – F, are given below. Each compound contains four carbon atoms in its molecule.$$ \text{CH}_3\...

2009 Winter

Theory

CH22 - ANALYTICAL TECHNIQUES

Three organic compounds, G, H, and J, each have the empirical formula $CH_2O$. The numbers of carbon atoms in their molecules are shown in the table.[...

2009 Winter

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the following reaction scheme which starts with 1-bromobutane. In each empty box, write the structural formula of the organic compound th...

2009 Winter

Theory

CH22 - ANALYTICAL TECHNIQUES

This question is about the modern techniques of analysis which may be used to determine molecular structures.(a) In X-ray crystallography X-rays are d...

2009 Winter

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Analysis of the bodies of birds of prey show that the pesticide residues accumulate in the fatty tissues of the birds. This is because of the high...

2009 Winter

MCQ

CH3 - CHEMICAL BONDING

Which molecule contains six bonding electrons?

2017 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The mass spectrum of a sample of lithium shows that it contains two isotopes, $^6\text{Li}$ and $^7\text{Li}$.The isotopic abundances are shown in the...

2017 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A sports medal has a total surface area of 150 cm$^2$. It was evenly coated with silver by electrolysis. Its mass increased by 0.216 g.How many atoms ...

2017 Summer

MCQ

CH2 - ATOMIC STRUCTURE

Which property of an atom does not affect its first ionisation energy?

2017 Summer

MCQ

CH3 - CHEMICAL BONDING

Which molecule has the largest overall dipole?

2017 Summer

MCQ

CH4 - STATES OF MATTER

The complete combustion of 2 moles of a straight chain alkane produces 400 dm^3 of carbon dioxide measured at 301 K and 1 \times 10^5 Pa. Carbon dioxi...

2017 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Which expression gives the standard enthalpy change of combustion of methane?

2017 Summer

MCQ

CH6 - ELECTROCHEMISTRY

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

2017 Summer

MCQ

CH6 - ELECTROCHEMISTRY

When $K_2MnO_4$ is dissolved in water, the following reaction occurs:$aMnO_4^{2-}(aq) + bH_2O(l) \rightarrow cMnO_4^{-}(aq) + dMnO_2(s) + eOH^{-}(aq)$...

2017 Summer

MCQ

CH7 - EQUILIBRIA

Methanol can be produced from hydrogen and carbon monoxide.$2H_2(g) + CO(g) \rightleftharpoons CH_3OH(g)$What is the expression for $K_p$ for this rea...

2017 Summer