MCQ

CH16 - HALOGEN DERIVATIVES

The following diagram represents the structure of a possible polymer.By which method might this polymer be made?

2009 Winter

MCQ

CH16 - HALOGEN DERIVATIVES

Which statements about the reaction of solid sodium bromide with concentrated sulfuric acid are correct?1. Hydrogen bromide is a product of the reacti...

2009 Winter

MCQ

CH16 - HALOGEN DERIVATIVES

Which statements are true for an $S_N2$ reaction? 1. One bond is broken as another bond is formed. 2. The formation of a transition state involves t...

2009 Winter

Theory

CH16 - HALOGEN DERIVATIVES

One method of making 1-bromobutane in the laboratory is described below.[Table_1](a) The overall reaction may be considered to take place in two stage...

2009 Winter

MCQ

CH16 - HALOGEN DERIVATIVES

In many countries plastic waste is collected separately and sorted. Some of this is incinerated to provide heat for power stations.Why is PVC, polyvin...

2010 Summer

MCQ

CH16 - HALOGEN DERIVATIVES

When an isomer Y of molecular formula C₄H₉Br undergoes hydrolysis in aqueous alkali to form an alcohol C₄H₉OH, the rate of reaction is found t...

2010 Summer

MCQ

CH16 - HALOGEN DERIVATIVES

Which reactions are examples of nucleophilic substitution?1. $\text{CH}_3\text{CH}_2\text{Br} + \text{OH}^- \rightarrow \text{CH}_3\text{CH}_2\text{OH...

2010 Summer

MCQ

CH16 - HALOGEN DERIVATIVES

When an isomer Y of molecular formula C_4H_9Br undergoes hydrolysis in aqueous alkali to form an alcohol C_4H_9OH, the rate of reaction is found to be...

2010 Summer

MCQ

CH16 - HALOGEN DERIVATIVES

Which reactions are examples of nucleophilic substitution? 1. $\text{CH}_3\text{CH}_2\text{Br} + \text{OH}^- \rightarrow \text{CH}_3\text{CH}_2\text{...

2010 Summer

MCQ

CH16 - HALOGEN DERIVATIVES

Which compound undergoes an $S_N1$ substitution reaction?

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