Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

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

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Benzene, $C_6H_6$, reacts with chloroethane, $C_2H_5Cl$, in the presence of a suitable catalyst to form ethylbenzene, $C_6H_5C_2H_5$. In the presence ...

2024 Winter

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

(a) (i) Give the systematic name of P....................................................................................................................

2024 Summer

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

(a) (i) Write an equation for the formation of the electrophile for step 1. .............................................................................

2024 Spring

5

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Four esters, A, B, C and D, with the molecular formula C$_6$H$_{12}$O$_2$, are shown in Fig. 7.1.(a) Give the systematic name of ester A.................

2024 Summer

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Fig. 6.1 shows two reactions of ethanedioic acid, HOOC-COOH.(a) (i) Draw the organic product G in the box in Fig. 6.1. [1](ii) In Fig. 6.1, SOCl$_2$ i...

2024 Winter

3

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Four esters, A, B, C and D, with the molecular formula $C_6H_{12}O_2$ are shown in Fig. 7.1.(a) Give the systematic name of ester A......................

2024 Summer

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Benzene, C_6H_6, reacts with chloroethane, C_2H_5Cl, in the presence of a suitable catalyst to form ethylbenzene, C_6H_5C_2H_5. In the presence of the...

2024 Winter

2

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

A reaction scheme is shown in Fig. 7.1.The reagents needed for reaction 2 and reaction 3 are stated.Reaction 5 takes place when $C_2H_5NH_2$ is mixed ...

2024 Winter

1

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Lactic acid, $\text{CH}_3\text{CH(OH)COOH}$, and pyruvic acid, $\text{CH}_3\text{COCOOH}$, both contain two functional groups. ![Image_1: Chemical str...

2023 Winter

3

MCQ

CH3 - CHEMICAL BONDING

Which molecule contains six bonding electrons?

2017 Summer

2

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The mass spectrum of a sample of lithium shows that it contains two isotopes, $^6\text{Li}$ and $^7\text{Li}$.The isotopic abundances are shown in the...

2017 Summer

2

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

A sports medal has a total surface area of 150 cm$^2$. It was evenly coated with silver by electrolysis. Its mass increased by 0.216 g.How many atoms ...

2017 Summer

2

MCQ

CH2 - ATOMIC STRUCTURE

Which property of an atom does not affect its first ionisation energy?

2017 Summer

2

MCQ

CH3 - CHEMICAL BONDING

Which molecule has the largest overall dipole?

2017 Summer

1

MCQ

CH4 - STATES OF MATTER

The complete combustion of 2 moles of a straight chain alkane produces 400 dm^3 of carbon dioxide measured at 301 K and 1 \times 10^5 Pa. Carbon dioxi...

2017 Summer

2

MCQ

CH5 - CHEMICAL ENERGETICS

Which expression gives the standard enthalpy change of combustion of methane?

2017 Summer

1

MCQ

CH6 - ELECTROCHEMISTRY

Solutions containing chlorate(I) ions are used as household bleaches and disinfectants. These solutions decompose on heating as shown. $$3ClO^- \righ...

2017 Summer

2

MCQ

CH6 - ELECTROCHEMISTRY

When $K_2MnO_4$ is dissolved in water, the following reaction occurs:$aMnO_4^{2-}(aq) + bH_2O(l) \rightarrow cMnO_4^{-}(aq) + dMnO_2(s) + eOH^{-}(aq)$...

2017 Summer

2

MCQ

CH7 - EQUILIBRIA

Methanol can be produced from hydrogen and carbon monoxide.$2H_2(g) + CO(g) \rightleftharpoons CH_3OH(g)$What is the expression for $K_p$ for this rea...

2017 Summer

3