MCQ

CH18 - CARBONYL COMPOUNDS

The naturally-occurring molecule civetone is found in a gland of the African civet cat and has been used in perfumery.With which reagent will civetone...

2009 Winter

MCQ

CH18 - CARBONYL COMPOUNDS

Cyanohydrins can be made from carbonyl compounds by generating $\text{CN}^-\text{ ions}$ from HCN in the presence of a weak base.In a similar reaction...

2009 Winter

MCQ

CH18 - CARBONYL COMPOUNDS

A compound has a relative molecular mass of 88 and its molecule contains only four carbon atoms. What could this compound be?

2009 Winter

MCQ

CH18 - CARBONYL COMPOUNDS

Which reagent will give similar results with both butanone and butanal?

2010 Summer

MCQ

CH18 - CARBONYL COMPOUNDS

What is formed when propanone is refluxed with a solution of NaBH₄?

2010 Summer

MCQ

CH18 - CARBONYL COMPOUNDS

Propanoic acid occurs naturally as a result of the bacterial fermentation of milk, and is partly responsible for the flavour of Swiss cheese.![propano...

2010 Summer

MCQ

CH18 - CARBONYL COMPOUNDS

The diagram shows some laboratory apparatus. Which preparations could this apparatus be used for?1. bromoethane, from ethanol, sodium bromide and conc...

2010 Summer

MCQ

CH18 - CARBONYL COMPOUNDS

Which reagent will give similar results with both butanone and butanal?

2010 Summer

MCQ

CH18 - CARBONYL COMPOUNDS

What is formed when propanone is refluxed with a solution of NaBH$_4$?

2010 Summer

MCQ

CH18 - CARBONYL COMPOUNDS

The diagram shows some laboratory apparatus.Which preparations could this apparatus be used for?1. bromoethane, from ethanol, sodium bromide and conce...

2010 Summer

Theory

CH2 - ATOMIC STRUCTURE

Fig. 1.1 shows how first ionisation energies vary across Period 2.(a) Construct an equation to represent the first ionisation energy of oxygen. Includ...

2022 Spring

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Some oxides of elements in Period 3 are shown.$\text{Na}_2\text{O}$\hspace{1cm}$\text{Al}_2\text{O}_3$\hspace{1cm}$\text{P}_4\text{O}_6$\hspace{1cm}$\...

2022 Spring

Theory

CH11 - GROUP 17

The hydrogen halides HCl, HBr and HI are all colourless gases at room temperature.(a) The hydrogen halides can be formed by reacting the halogens with...

2022 Spring

Theory

CH18 - CARBONYL COMPOUNDS

Compounds J and K are found in plant oils.[Image_1: Illustration of compounds J and K]Fig. 4.1(a) (i) Complete Table 4.1 to state what you would obser...

2022 Spring

Theory

CH7 - EQUILIBRIA

Iodine is found naturally in compounds in many different oxidation states.(a) Iodide ions, $\text{I}^-$, react with acidified $\text{H}_2\text{O}_2$(a...

2022 Spring

Theory

CH5 - CHEMICAL ENERGETICS

Silicon is the second most abundant element by mass in the Earth's crust.(a) In industry, silicon is extracted from SiO$_2$ by reaction with carbon at...

2022 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Titanium is a transition element in Period 4. It is commonly found as TiO2 in minerals.(a) (i) Define transition element.................................

2022 Spring

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Compounds F and J are shown in Fig. 4.1.Fig. 4.1(a) F and J both contain the arene functional group.(i) Identify...

2022 Spring

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

2-Chloropropanoic acid, CH₃CHClCOOH, is used in many chemical syntheses.(a) (i) An equilibrium is set up when CH₃CHClCOOH is added to water. Write...

2022 Spring

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Lidocaine is used as an anaesthetic. A synthesis of lidocaine is shown in Fig. 6.1.(a) W can be formed by reacting HOCH$_2$COOH with an excess of SOCl...

2022 Spring