MCQ

CH20 - NITROGEN COMPOUNDS

When sulfur trioxide is manufactured from sulfur dioxide and oxygen, using the Contact process, which condition affects the value of the equilibrium c...

2009 Winter

MCQ

CH20 - NITROGEN COMPOUNDS

In an historically famous experiment Wöhler heated 'inorganic' ammonium cyanate in the absence of air. The only product of the reaction was 'organic'...

2009 Winter

MCQ

CH20 - NITROGEN COMPOUNDS

A farmer added lime to damp soil, followed by the nitrogenous fertiliser ammonium sulfate. A chemical reaction occurred in the soil. Which substances ...

2009 Winter

Theory

CH20 - NITROGEN COMPOUNDS

(a) (i) Suggest reagents and conditions forreaction I, .................................................................................................

2009 Winter

Theory

CH20 - NITROGEN COMPOUNDS

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

2009 Winter

MCQ

CH20 - NITROGEN COMPOUNDS

The Haber process for the manufacture of ammonia is represented by the following equation. \( \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\tex...

2010 Summer

MCQ

CH20 - NITROGEN COMPOUNDS

How does concentrated sulfuric acid behave when it reacts with sodium chloride?

2010 Summer

MCQ

CH20 - NITROGEN COMPOUNDS

The percentage of ammonia obtainable, if equilibrium were established during the Haber process, is plotted against the operating pressure for two temp...

2010 Summer

MCQ

CH20 - NITROGEN COMPOUNDS

In a car engine, non-metallic element X forms a pollutant oxide Y. Further oxidation of Y to Z occurs in the atmosphere. In this further oxidation, 1 ...

2010 Summer

MCQ

CH20 - NITROGEN COMPOUNDS

Sulfur dioxide and sulfites are used in food preservation. Why are they used for this purpose?1. They are reducing agents so retard the oxidation of f...

2010 Summer

Theory

CH3 - CHEMICAL BONDING

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.Use the information in Table 1.1 to answe...

2023 Spring

Theory

CH10 - GROUP 2

The Group 2 elements Mg to Ba are all silvery-white reactive metals.(a) (i) Draw a labelled diagram to show the bonding and structure of the Group 2 m...

2023 Spring

Theory

CH15 - HYDROCARBONS

(a) (i) Define addition reaction.........................................................................................................................

2023 Spring

Theory

CH16 - HALOGEN DERIVATIVES

(a) (i) State the reagent and conditions used to form E in reaction 1....................................................................................

2023 Spring

Theory

CH2 - ATOMIC STRUCTURE

(a) The most common zinc mineral contains zinc(II) sulfide, ZnS.(i) Complete the electrons in boxes diagram in Fig. 1.1 to show the electronic configu...

2023 Spring

Theory

CH6 - ELECTROCHEMISTRY

Hypophosphorous acid is an inorganic acid.The conjugate base of hypophosphorous acid is $\text{H}_2\text{PO}_2^-$.(a) Give the formula of hypophosphor...

2023 Spring

Theory

CH12 - AN INTRODUCTION TO THE CHEMISTRY OF TRANSITION ELEMENTS

Vanadium is a transition element in Period 4 of the Periodic Table.(a) Define transition element.........................................................

2023 Spring

Theory

CH20 - NITROGEN COMPOUNDS

Ethylamine and phenylamine are primary amines.Fig. 4.1These two compounds are synthesised by different methods.(a) Several methods can be used to form...

2023 Spring

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

(a) Tulobuterol contains a benzene ring in its structure.Describe and explain the shape of benzene.In your answer, include:• the bond angle between ...

2023 Spring

Theory

CH22 - ANALYTICAL TECHNIQUES

(a) (i) Suggest a compound that could be used as the stationary phase in this experiment.................................................................

2023 Spring