4E ScChem TYS MCQ - Alc & Carboxylic Acids

An organic compound E reacts with acidified potassium manganate(VII) solution causing a colour change.

What is E?

• ethane

• ethanoic acid

• ethanol

• poly(ethene)

Which change cannot be achieved by a single chemical reaction?

• ethanol to ethanoic acid

• ethanol to propanol

• ethene to poly(ethene)

• glucose to ethanol and carbon dioxide

Which statements about ethanol are correct?

1 It burns completely to produce carbon monoxide and water.

2 It belongs to the homologous series named alcohols.

3 It contains a C=O bond.

4 It is oxidised by potassium manganate(VII).

• 1 and 3

• 1 and 4

• 2 and 3

• 2 and 4

Which product is formed when ethanol is oxidised by acidified potassium manganate(VII)?

• ethane

• ethanoic acid

• ethene

• methanol

Which compound forms ethanoic acid when it is oxidised?

• carbon monoxide

• ethane

• ethanol

• ethene

Which change cannot be achieved by a single chemical reaction?

• ethanol to ethanoic acid

• ethanol to propanol

• ethene to ethanol

• glucose to ethanol and carbon dioxide

The results of two tests on compound Z are shown.

Which structure is Z?

• 
• 
• 
• 

When ethanol is left standing in the air for some time, it becomes acidic.

Which equation represents this change?