Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Oxygen is a Group 16 element. (a) (i) Write equations for the following reactions. • sodium and oxygen • sulfur and oxygen $\text{.............

2024 Winter

3

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Cobalt, rhodium and iridium are metals in the same group of the Periodic Table. (a) The shorthand electronic configuration of cobalt is [Ar]3d\(^7\)4s...

2024 Winter

2

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Chlorine is one of the elements in Group 17 of the Periodic Table.(a) (i) Describe the colours of the Group 17 elements, chlorine to iodine, at room t...

2024 Winter

3

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

CH_3(CH_2)_5CHBrCH_3 exists as a pair of stereoisomers.(a) Draw the three-dimensional structures of the two stereoisomers of CH_3(CH_2)_5CHBrCH_3. R c...

2024 Summer

2

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

(a) \( NH_3(g) \) reacts with \( HCl(g) \) to produce \( NH_4Cl(s) \), as shown.\[ NH_3(g) + HCl(g) \rightarrow NH_4Cl(s) \]Draw a diagram to show the...

2024 Summer

2

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

(a) P, Q, R and S show stereoisomerism.Complete Table 4.1 by identifying with a tick (✓) the type of stereoisomerism that each molecule shows.The ty...

2024 Spring

5

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

(a) V shows stereoisomerism.(i) Explain what is meant by stereoisomerism.................................................................................

2024 Summer

2

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Cobalt, rhodium and iridium are metals in the same group of the Periodic Table.(a) The shorthand electronic configuration of cobalt is [Ar]3d^7 4s^2.(...

2024 Winter

3

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Propanone, $\text{CH}_3\text{COCH}_3$, is an important organic reagent. Fig. 4.1 shows some reactions of propanone and its derivatives.(a) Reaction 1 ...

2024 Winter

3

Theory

CH14 - AN INTRODUCTION TO ORGANIC CHEMISTRY

Ruthenium and osmium are transition metals below iron in Group 8 of the Periodic Table.(a) Two different complex ions, $X$ and $Y$, can form when anhy...

2024 Spring

2

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Some intercontinental jet airliners use kerosene as fuel. The formula of kerosene may be taken as $C_{14}H_{30}$.(a) To which homologous series of com...

2011 Summer

6

Theory

CH15 - HYDROCARBONS

(a) (i) What is meant by the term `cracking` and why is it carried out?..................................................................................

2011 Summer

4

Theory

CH10 - GROUP 2

(a) State the formula of each of the calcium compounds U to Y.   U V W X Y (b) Compound Y may be converted into compound V. Out...

2011 Summer

2

Theory

CH18 - CARBONYL COMPOUNDS

Ketones are widely used as solvents and as intermediates in the chemical industry.Ketones contain the reactive keto group, $\text{C=O}$.(a) Propanone,...

2011 Summer

3

Theory

CH5 - CHEMICAL ENERGETICS

(a) When calcium carbide is reacted with water, ethyne and calcium hydroxide are formed. Construct a balanced equation for this reaction. (b) (i) Wh...

2011 Summer

2

Theory

CH7 - EQUILIBRIA

Ethanoic acid can be reacted with alcohols to form esters, an equilibrium mixture being formed.$$\text{CH}_3\text{CO}_2\text{H} + \text{ROH} \rightlef...

2011 Summer

3

Theory

CH16 - HALOGEN DERIVATIVES

(a) Use relevant bond energies from the Data Booklet, and the equation below to calculate a value for the bond energy of the C–F bond.CH$_2$ = CH$_2...

2011 Summer

3

Theory

CH10 - GROUP 2

(a) State the formula of each of the barium compounds R to W.R .................................... S ....................................T .............

2011 Summer

1

Theory

CH6 - ELECTROCHEMISTRY

(a) (i) Describe, with the aid of a fully labelled diagram, the industrial electrolysis of brine in a diaphragm cell. State what each electrode is mad...

2011 Summer

4

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Although there are many different types of food eaten around the world, animal fats and/or vegetable oils are commonly used in cooking.Animal fats and...

2011 Summer

2