Theory

CH6 - ELECTROCHEMISTRY

Bismuth is an element in Group 15 of the Periodic Table.(a) Bismuth has metallic bonding.Draw a labelled diagram to show the metallic bonding in bismu...

2024 Spring

4

Theory

CH6 - ELECTROCHEMISTRY

(a) A and B react together to give product AB.A + B → ABWhen the concentrations of A and B are both 0.0100 mol dm−3, the rate of formation of AB i...

2024 Winter

3

Theory

CH6 - ELECTROCHEMISTRY

(a) Explain why transition elements form complex ions. .................................................................................................

2024 Winter

3

Theory

CH6 - ELECTROCHEMISTRY

Potassium iodide, KI, is used as a reagent in both inorganic and organic chemistry.(a) KI forms an ionic lattice that is soluble in water.(i) Define e...

2024 Spring

4

Theory

CH6 - ELECTROCHEMISTRY

(a) (i) Lithium nitrate, LiNO₃, decomposes on heating in a similar way to Group 2 nitrates to give the metal oxide, a brown gas and oxygen.Write an ...

2024 Summer

3

Theory

CH6 - ELECTROCHEMISTRY

(a) (i) Define transition element........................................................................................................................

2024 Summer

5

Theory

CH6 - ELECTROCHEMISTRY

(a) Equation 1 shows water acting as a Brønsted–Lowry acid. equation 1 \[ \text{H}_2\text{O} + \text{NO}_2^- \rightleftharpoons \text{HNO}_2 + \tex...

2024 Spring

2

Theory

CH6 - ELECTROCHEMISTRY

(a) When a sample of hydrated lithium ethanedioate, $\text{Li}_2\text{C}_2\text{O}_4 \cdot \text{H}_2\text{O}$, is gently heated, two gaseous products...

2024 Summer

2

Theory

CH6 - ELECTROCHEMISTRY

(a) Define standard electrode potential, $E^\text{o}$, including a description of standard conditions.(b) (i) An electrochemical cell is set up to mea...

2024 Summer

3

Theory

CH6 - ELECTROCHEMISTRY

(a) The equation for reaction 1 is shown.reaction 1\qquad X \rightarrow 2YReaction 1 is first order with respect to the concentration of X. The half-l...

2024 Winter

2

MCQ

CH4 - STATES OF MATTER

The temperature of a sample of an inert gas is increased.What effect does this have on the number of molecules with the most probable energy and on th...

2019 Summer

2

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A sample of element X is analysed using mass spectrometry. The mass spectrum obtained is shown.What is the relative atomic mass of this sample of elem...

2019 Summer

1

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A washing powder contains sodium hydrogencarbonate, NaHCO_3, as one of the ingredients.In a titration, a solution containing 1.00 g of this washing po...

2019 Summer

2

MCQ

CH2 - ATOMIC STRUCTURE

The outermost electron in an atom of neon occupies a particular orbital.Which row shows the relative energy and shape of this orbital?[Table_1: Energy...

2019 Summer

1

MCQ

CH3 - CHEMICAL BONDING

In which species is there a lone pair of electrons?

2019 Summer

2

MCQ

CH4 - STATES OF MATTER

When an evacuated tube of volume 400 cm$^3$ is filled with gas at 300 K and 101 kPa, the mass of the tube increases by 0.65 g.Assume the gas behaves a...

2019 Summer

1

MCQ

CH4 - STATES OF MATTER

Under which conditions will nitrogen behave most like an ideal gas?[Table with conditions]

2019 Summer

2

MCQ

CH5 - CHEMICAL ENERGETICS

Two reactions and their enthalpy changes are shown.2C(s) + 2H$_2$(g) \rightarrow C$_2$H$_4$(g) \hspace{1em} \Delta H^\circ = +52.2 \text{ kJ mol}^{-1}...

2019 Summer

3

MCQ

CH6 - ELECTROCHEMISTRY

Ethandioic acid, HO$_2$CCO$_2$H, can be oxidised by KMnO$_4$ in dilute sulfuric acid. The products of this reaction are carbon dioxide, water, potassi...

2019 Summer

2

MCQ

CH7 - EQUILIBRIA

Hydrogen iodide gas decomposes reversibly producing iodine vapour and hydrogen.$$2HI(g) \rightleftharpoons I_2(g) + H_2(g) \quad \Delta H = +12 \text{...

2019 Summer

1