MCQ

CH11 - GROUP 17

Which graph correctly describes a trend found in the halogen group?[X represents a halogen atom.]

2009 Winter

Theory

CH11 - GROUP 17

(a) Describe and explain how the basicities of ammonia, ethylamine and phenylamine differ................................................................

2009 Winter

MCQ

CH11 - GROUP 17

X is a salt of one of the halogens chlorine, bromine, iodine, or astatine (proton number 85). The reaction scheme shows a series of reactions using a ...

2010 Summer

MCQ

CH11 - GROUP 17

Swimming pool water can be kept free of harmful bacteria by adding aqueous sodium chlorate(I), NaOCl. This reacts with water to produce HOCl molecules...

2010 Summer

MCQ

CH11 - GROUP 17

X is a salt of one of the halogens chlorine, bromine, iodine, or astatine (proton number 85).The reaction scheme shows a series of reactions using a s...

2010 Summer

MCQ

CH11 - GROUP 17

Chile saltpetre, NaNO_3, contains sodium iodide as an impurity. Aqueous silver nitrate is added to an aqueous solution of Chile saltpetre. Concentrate...

2010 Winter

MCQ

CH11 - GROUP 17

Which statement describes the halogens chlorine, bromine and iodine?

2010 Winter

MCQ

CH11 - GROUP 17

Which statement describes the halogens chlorine, bromine and iodine?

2010 Winter

MCQ

CH11 - GROUP 17

Which equation represents the change corresponding to the enthalpy change of atomisation of iodine?

2010 Winter

Theory

CH11 - GROUP 17

The gaseous hydrogen halides HCl, HBr and HI, may be prepared by reacting the corresponding sodium salt with anhydrous phosphoric(V) acid, H₃PO₄.W...

2010 Winter

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