Theory

CH18 - CARBONYL COMPOUNDS

Compound $W$ has molecular formula $C_4H_{10}O$. It contains only one functional group.(a) Table 5.1 shows the two peaks with the greatest $m/e$ value...

2024 Summer

2

Theory

CH18 - CARBONYL COMPOUNDS

Propanope, CH₃COCH₃, is an important organic reagent. Fig. 4.1 shows some reactions of propanone and its derivatives.[Image_1: Fig. 4.1 with react...

2024 Winter

4

Theory

CH18 - CARBONYL COMPOUNDS

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

CH18 - CARBONYL COMPOUNDS

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

2023 Spring

2

Theory

CH18 - CARBONYL COMPOUNDS

Y is formed from X in a single-step reaction, as shown in Fig. 5.1.(a) Deduce the empirical formula of Y.................................................

2023 Summer

2

Theory

CH18 - CARBONYL COMPOUNDS

G belongs to a group of compounds called ethers.(a) When G, C₄H₁₀O, is heated, thermal decomposition occurs.C₄H₁₀O(g) → C₂H₆(g) + CO...

2022 Summer

2

Theory

CH18 - CARBONYL COMPOUNDS

Compounds J and K are found in plant oils.[Image_1: Illustration of compounds J and K]Fig. 4.1(a) (i) Complete Table 4.1 to state what you would obser...

2022 Spring

2

Theory

CH18 - CARBONYL COMPOUNDS

Hydroxyethanal, HOCH$_2$CHO, has been observed in dust clouds near the centre of our galaxy.hydroxyethanal(a) Predict the bond angles labelled x and y...

2021 Spring

2

Theory

CH18 - CARBONYL COMPOUNDS

(a) (i) Reaction 1 is an oxidation reaction.Give the reagent(s) and conditions required for reaction 1.reagent(s) .......................................

2021 Winter

2

Theory

CH18 - CARBONYL COMPOUNDS

(a) (i) Reaction 1 is an oxidation reaction.Give the reagent(s) and conditions required for reaction 1.reagent(s) .......................................

2021 Winter

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