Theory

CH4 - STATES OF MATTER

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{table} \centering \b...

2024 Winter

4

Theory

CH4 - STATES OF MATTER

(a) Table 3.1 shows some properties of two Group 14 elements, C and Sn, in their standard states. The table is incomplete.\begin{center} Table 3.1 \en...

2024 Winter

2

Theory

CH4 - STATES OF MATTER

NO and NO_2 react at 25 °C to give N_2O_3 as shown in the equation.NO(g) + NO_2(g) \rightleftharpoons N_2O_3(g) \hspace{5mm} \Delta H = -7.2 \, \text...

2023 Winter

3

Theory

CH4 - STATES OF MATTER

Potassium chlorate, $KClO_3$, is widely used as an oxidising agent and to make $O_2(g)$.(a) Define oxidising agent.......................................

2023 Winter

2

Theory

CH4 - STATES OF MATTER

The rate of chemical reactions is affected by changes in temperature and pressure.(a) (i) Draw a curve on the axes to show the Boltzmann distribution ...

2021 Spring

1

Theory

CH4 - STATES OF MATTER

Carbon monoxide gas, CO(g), and nitrogen gas, N_2(g), are both diatomic molecules.(a) The diagram shows the arrangement of outer electrons in a molecu...

2021 Summer

2

Theory

CH4 - STATES OF MATTER

Gallium is an element in Group 13.A sample of gallium is analysed using a mass spectrometer. The mass spectrum produced is shown.(a) Explain what is m...

2020 Summer

3

Theory

CH4 - STATES OF MATTER

(a) Write an equation to show the reaction occurring in stage 1..........................................................................................

2020 Summer

2

Theory

CH4 - STATES OF MATTER

(a) Explain what is meant by the term relative isotopic mass.............................................................................................

2020 Summer

2

Theory

CH4 - STATES OF MATTER

Calcium nitrate, Ca(NO3)2, reacts with ammonia, carbon dioxide and water to form a mixture of ammonium nitrate and calcium carbonate.Ca(NO3)2 + 2NH3 +...

2020 Summer

2

MCQ

CH8 - REACTION KINETICS

The diagram shows a Boltzmann distribution of molecular energies for a gaseous mixture. The distribution has a peak, labelled P on the diagram. What h...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

Which quantity gives the best indication of the relative strengths of the hydrogen bonds between the molecules in liquid hydrogen halides?

2015 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Use of the Data Booklet is relevant to this question.1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50 g of the carbon combusts t...

2015 Summer

MCQ

CH6 - ELECTROCHEMISTRY

In oxygen difluoride, $\text{OF}_2$, fluorine has an oxidation number of $-1$. $\text{OF}_2$ will react with sulfur dioxide according to the following...

2015 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 below.$pV = nRT$0.96 g of oxygen gas is ...

2015 Summer

1

MCQ

CH7 - EQUILIBRIA

One mole of phosphorus(V) chloride, $\text{PCl}_5$, is heated to 600 K in a sealed flask of volume 1 dm$^3$. Equilibrium is established and measuremen...

2015 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The standard enthalpy changes of combustion of glucose and ethanol are given as −2820 and −1368 kJ molˉ¹ respectively.Glucose, C$_6$H$_{12}$O$_6...

2015 Summer

1

MCQ

CH7 - EQUILIBRIA

In which reaction is the underlined substance acting as a base? A. $\text{HNO}_3 + \underline{\text{H}_2\text{SO}_4} \rightarrow \text{H}_2\text{NO}_...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One molecule of haemoglobin, Hb, can bind with four molecules of oxygen according to the following equation. $$\text{Hb(aq)} + 4\text{O}_2\text{(aq)}...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

The double bond between the two carbon atoms in an ethene molecule consists of one \( \sigma \) bond and one \( \pi \) bond.Which orbitals overlap to ...

2015 Summer

1