Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

(a) In the following boxes draw the structural formulae of three alcohols having straight (i.e. unbranched) chains, with the molecular formula $C_5H_{...

2009 Summer

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Sorbic acid is used as a food preservative because it kills fungi and moulds.[Image_1: Sorbic acid structural formula]Sorbic acid will react withhydro...

2009 Winter

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

The characteristic odour of rum is attributed to the compound 2-ethyl-3-methylbutanoic acid.\[ \begin{align*} &\text{H}_3\text{C} &&&&&\text{CH}_3 \ &...

2009 Winter

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

The acarid mite releases extit{lardolure} to attract other mites to a host. This chemical can be destroyed by hydrolysis with acid. \[ \text{CH}_3\t...

2009 Winter

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Which compound is a product of the hydrolysis of $CH_3CO_2C_3H_7$ by boiling aqueous sodium hydroxide?

2010 Summer

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

When organic refuse decomposes in water carboxylic acids are formed. The water becomes acidic and aquatic life is destroyed.Which additives are suitab...

2010 Summer

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Which compound is a product of the hydrolysis of $CH_3CO_2C_3H_7$ by boiling aqueous sodium hydroxide?

2010 Summer

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

When organic refuse decomposes in water carboxylic acids are formed. The water becomes acidic and aquatic life is destroyed.Which additives are suitab...

2010 Summer

MCQ

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Propanoic acid occurs naturally as a result of the bacterial fermentation of milk, and is partly responsible for the flavour of Swiss cheese.Which sta...

2010 Summer

Theory

CH19 - CARBOXYLIC ACIDS AND DERIVATIVES

Acyl chlorides are useful intermediates in organic syntheses.(a) (i) State a suitable reagent for converting carboxylic acids into acyl chlorides........

2010 Summer

MCQ

CH2 - ATOMIC STRUCTURE

In which species does the underlined atom have an incomplete outer shell?

2012 Summer

MCQ

CH7 - EQUILIBRIA

Ammonia is manufactured by the Haber Process, in an exothermic reaction. Assuming that the amount of catalyst remains constant, which change will not ...

2012 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The equation for a reaction is shown.$\text{H}_2(g) + \frac{1}{2}\text{O}_2(g) \rightarrow \text{H}_2\text{O}(l) ; \Delta H = x \text{ kJ mol}^{-1}$Wh...

2012 Summer

MCQ

CH2 - ATOMIC STRUCTURE

The value of the second ionisation energy of calcium is 1150 kJ mol^{-1}. Which equation correctly represents this statement?

2012 Summer

MCQ

CH3 - CHEMICAL BONDING

Two conversions are outlined below.$$\text{NH}_4^+ \rightarrow \text{NH}_3$$$$\text{C}_2\text{H}_4 \rightarrow \text{C}_2\text{H}_6$$What similar feat...

2012 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.$pV = nRT$0.56 g of ethene gas is contai...

2012 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

Propanone has the molecular formula $C_3H_6O$.The enthalpy change of combustion of hydrogen is $-286\text{ kJ mol}^{-1}$.The enthalpy change of combus...

2012 Summer

MCQ

CH4 - STATES OF MATTER

Under which set of conditions is a gas most likely to behave ideally? [Table_1]

2012 Summer

MCQ

CH7 - EQUILIBRIA

Two moles of compound P were placed in a vessel. The compound P was partly decomposed by heating. A dynamic equilibrium between chemicals P, Q and R w...

2012 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

The oxide of titanium, TiO₂, is used as a ‘whitener’ in toothpaste. It is obtained from the ore iron(II) titanate, FeTiO₃.What is the change, ...

2012 Summer