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

MCQ

CH2 - ATOMIC STRUCTURE

In which species does the underlined atom have an incomplete outer shell?

2012 Summer

MCQ

CH7 - EQUILIBRIA

Ammonia is manufactured by the Haber Process, in an exothermic reaction. Assuming that the amount of catalyst remains constant, which change will not ...

2012 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The equation for a reaction is shown.$\text{H}_2(g) + \frac{1}{2}\text{O}_2(g) \rightarrow \text{H}_2\text{O}(l) ; \Delta H = x \text{ kJ mol}^{-1}$Wh...

2012 Summer

MCQ

CH2 - ATOMIC STRUCTURE

The value of the second ionisation energy of calcium is 1150 kJ mol^{-1}. Which equation correctly represents this statement?

2012 Summer

MCQ

CH3 - CHEMICAL BONDING

Two conversions are outlined below.$$\text{NH}_4^+ \rightarrow \text{NH}_3$$$$\text{C}_2\text{H}_4 \rightarrow \text{C}_2\text{H}_6$$What similar feat...

2012 Summer

MCQ

CH4 - STATES OF MATTER

Use of the Data Booklet is relevant to this question.The gas laws can be summarised in the ideal gas equation.$pV = nRT$0.56 g of ethene gas is contai...

2012 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Propanone has the molecular formula $C_3H_6O$.The enthalpy change of combustion of hydrogen is $-286\text{ kJ mol}^{-1}$.The enthalpy change of combus...

2012 Summer

MCQ

CH4 - STATES OF MATTER

Under which set of conditions is a gas most likely to behave ideally? [Table_1]

2012 Summer

MCQ

CH7 - EQUILIBRIA

Two moles of compound P were placed in a vessel. The compound P was partly decomposed by heating. A dynamic equilibrium between chemicals P, Q and R w...

2012 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The oxide of titanium, TiO₂, is used as a ‘whitener’ in toothpaste. It is obtained from the ore iron(II) titanate, FeTiO₃.What is the change, ...

2012 Summer