Alcohols

Which statement concerning members of the homologous series of alcohols is correct?

May/June 2015

A student uses the apparatus shown to determine the energy released by the combustion of each of three alcohols, X, Y and Z. In every experiment $0.1\text{ mol}$ of alcohol is burnt, and the water starts at $20\,^{\circ}\text{C}$.

May/June 2015

Which of the following statements about alcohols are correct?

May/June 2016

Wine is an alcoholic drink containing ethanol. When wine is kept in contact with air for too long, it may turn acidic. This happens because the ethanol is ......1...... to the acid ......2...... . Which word and formula correctly fill gaps 1 and 2?

May/June 2016

Ethanoic acid is produced when ethanol reacts with acidified potassium manganate(VII). What is this process called?

May/June 2017

The displayed structure of compound X is $CH_3-CH_2-CH_2-CH_2-OH$. Which statement is incorrect?

May/June 2017

Ethanol and butanol are each alcohols.

May/June 2017

The table gives some data on the homologous series of unbranched alcohols.

May/June 2017

This question focuses on ethanol and ethanoic acid. The structural diagrams for ethanol and ethanoic acid are shown.

May/June 2018

Two equations concerning ethanol are given below. 1 ethanol + oxygen $\xrightarrow{\text{oxidation}}$ carboxylic acid 2 glucose $\xrightarrow{\text{fermentation}}$ ethanol + carbon dioxide Which row is correct?

May/June 2019

Which of the following statements about alcohols are correct?

May/June 2021

Which of the following statements about alcohols are correct?

May/June 2021

A student is oxidising a sample of ethanol. The diagram shows some of the apparatus used.

May/June 2021

A reaction sequence for making propanol from the naphtha fraction of petroleum (crude oil) is illustrated. What are processes X and Y?

May/June 2022

The structural formulas of four alcohols are displayed. Which statement is correct?

May/June 2022

The diagram represents several reactions of butanol. At the centre is butanol, $\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{OH}$. When complete combustion occurs, gas A and liquid B are formed. When combustion is incomplete, liquid B and gas C are formed. Oxidation with acidified potassium manganate(VII) gives organic liquid D. Heating with ethanoic acid produces liquid B and organic liquid E.

May/June 2022

Hexan-3-ol belongs to the alcohols. How many molecules of oxygen are required for the complete combustion of one molecule of hexan-3-ol?

May/June 2023

Methanol, propan-1-ol and propan-2-ol belong to the alcohol family. Fig. 7.1 shows the displayed formulae for methanol and propan-1-ol.

May/June 2023

Ethanol can be made by using either ethene or glucose as the initial raw material. Which row is correct?

May/June 2024

Which compound is classified as an alcohol?

May/June 2025

Compound P is an alcohol with the molecular formula $\text{C}_4\text{H}_{10}\text{O}$. What is the number of structural isomers of compound P?

May/June 2025

Which statement concerning members of the homologous series of alcohols is correct?

May/June 2025

Ethanol, $\text{C}_2\text{H}_5\text{OH}$, belongs to the homologous series of alcohols.

May/June 2025

On oxidation, which alcohol will form $\text{CH}_3\text{CH}_2\text{CO}_2\text{H}$?

Oct/Nov 2015

How many of these statements about ethanol are true? 1 its molecular formula is $\text{C}_2\text{H}_6\text{O}$ 2 it is made from ethane and steam 3 it oxidises to ethanoic acid 4 it is formed by the fermentation of glucose 5 it is burned as a fuel 6 it is used to dissolve substances

Oct/Nov 2015

Which compound has the greatest viscosity and is the least flammable?

Oct/Nov 2016

Alcohols belong to a homologous series with general formula C$_n$H$_{2n+1}$OH. The table gives some details about different alcohols.

Oct/Nov 2016

The table lists statements about the ways ethanol is manufactured on a large scale from ethene and from glucose. Which rows are correct?

Oct/Nov 2017

When an alcohol with molecular formula $\text{C}_4\text{H}_{10}\text{O}$ undergoes oxidation, what is the molecular formula of the acid produced?

Oct/Nov 2017

Which of these statements about the alcohol $\text{CH}_3\text{CH}_2\text{CH}_2\text{OH}$ are correct?

Oct/Nov 2019

Which compound should be identified as an alcohol?

Oct/Nov 2019

Each of the reactions shown below involves ethanol. 1. $\text{C}_2\text{H}_5\text{OH} + \text{O}_2 \rightarrow \text{CH}_3\text{COOH} + \text{H}_2\text{O}$ 2. $\text{C}_2\text{H}_5\text{OH} + \text{CH}_3\text{COOH} \rightarrow \text{CH}_3\text{COOC}_2\text{H}_5 + \text{H}_2\text{O}$ 3. $\text{C}_6\text{H}_{12}\text{O}_6 \rightarrow 2\text{C}_2\text{H}_5\text{OH} + 2\text{CO}_2$ Which row gives the correct description of each reaction?

Oct/Nov 2020

The table presents several properties of five alcohols.

Oct/Nov 2020

Glycerol is an alcohol molecule containing three -OH groups in each molecule. What equation represents the combustion of glycerol?

Oct/Nov 2023

Two statements are given. 1 During the fermentation of glucose to produce ethanol, one glucose molecule gives three molecules of ethanol. 2 In the conversion of ethanol into ethanoic acid, ethanol functions as an oxidising agent. Which row for these statements is correct?

Oct/Nov 2023

The two reactions below are given. For reaction 1 $\text{CH}_2\text{CH}=\text{CH}_2\text{OH} + \text{H}_2 \xrightarrow{\text{Ni}}$ compound X For reaction 2 compound X $\xrightarrow{\text{acidified } \text{KMnO}_4\text{(aq)}}$ compound Y Which row is the correct one?

Oct/Nov 2024

Compound X is an alcohol with only three carbon atoms. Compound Y is an alcohol with only four carbon atoms. Both compounds follow the general formula $\mathrm{C}_n\mathrm{H}_{2n+1}\mathrm{OH}$. Which row gives the numbers of structural isomers of compounds X and Y that are unbranched alcohols?

Oct/Nov 2025