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

(a) Complete the table to show the composition and identity of some atoms and ions.[Table]name of element | nucleon number | atomic number | number of...

2016 Summer

Theory

CH4 - STATES OF MATTER

D, E, F, and G are four consecutive elements in the fourth period of the Periodic Table. (The letters are not the actual symbols of the elements.)D is...

2016 Summer

Theory

CH10 - GROUP 2

The elements in Group 2, and their compounds, show many similarities and trends in their properties.(a) Magnesium, calcium, strontium and barium all r...

2016 Summer

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

This question is about molecules with molecular formula $C_4H_8$.(a) Give the structures of a pair of **positional** isomers with the formula $C_4H_8$...

2016 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) Complete the diagram to show the mechanism of reaction 1. Include all necessary charges, partial charges, lone pairs and curly arrows.H3C—C—Br...

2016 Summer

Theory

CH2 - ATOMIC STRUCTURE

(a) Complete the table to show the composition and identity of some atoms and ions.[Table_1]name of element | nucleon number | atomic number | number ...

2016 Summer

Theory

CH5 - CHEMICAL ENERGETICS

The elements in Group 17, the halogens, and their compounds, show many similarities and trends in their properties. Some data are given for the elemen...

2016 Summer

Theory

CH6 - ELECTROCHEMISTRY

Acidified potassium dichromate(VI) can oxidise ethanedioic acid, $H_2C_2O_4$. The relevant half-equations are shown. $$Cr_2O_7^{2-} + 14H^+ + 6e^- \r...

2016 Summer

Theory

CH22 - ANALYTICAL TECHNIQUES

This question is about molecules with molecular formula $C_4H_8O_2$.(a) Give the structural formulae of the pair of extbf{chain} isomers with the for...

2016 Summer

Theory

CH17 - HYDROXY COMPOUNDS

A reaction sequence based on propan-1-ol is shown. (a) Reactions 1 and 2 can both be carried out using the same reagents. (i) Identify suitable rea...

2016 Summer