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Ch.14 Alcohols

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Total cards: 17•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

Compare alcohols to there corresponding alkanes and why

Back (Answer)

Less volatile, higher melting points, greater water solubility these differences get smaller as chain length increases alcohols form hydrogen bonds due to presence of O-H being polar

#2
Front (Question)

Difference in the degrees of alcohols

Back (Answer)

. Primary- OH bonded C is bonded to 1 alkyl group (and methanol) . Secondary- 2 alkyl groups . Tertiary- 3 alkyl groups

#3
Front (Question)

Which alcohols can be oxidised

Back (Answer)

Primary and secondary

#4
Front (Question)

Conditions needed for the oxidation of alcohols

Back (Answer)

Oxidising agent- potassium dichromate(VI) K2Cr2O7 acidified by dilute sulphuric acid H2SO4

#5
Front (Question)

Results of the oxidation of alcohols

Back (Answer)

Dichromate solution is reduced. Dichromate2- ions go from orange to green chromium3+ ions

#6
Front (Question)

primary alcohols oxidise to form

Back (Answer)

Can be oxidised to aldehydes or carboxylic acids

#7
Front (Question)

Aldehyde are oxidised to form

Back (Answer)

Carboxylic acids

#8
Front (Question)

Preparation of aldehydes

Back (Answer)

Gentle heating of primary alcohols with acidified potassium dichromate forms an aldehyde. Which is distilled out of the reaction mixture. Orange to green

#9
Front (Question)

Preparation of carboxylic acids

Back (Answer)

Primary alcohol is heated strongly under reflux with excess oxidising agent ensuring all the alcohol is oxidised. Heating under reflux ensures any initial aldehydes are oxidised to form carboxylic acids

#10
Front (Question)

Oxidation of secondary alcohols

Back (Answer)

Oxidised to form ketones

#11
Front (Question)

Preparation of ketones

Back (Answer)

Heat secondary alcohol under reflux with oxidising (acidified potassium dichromate) mixture (orange to green)

#12
Front (Question)

How do u show an oxidising agent

Back (Answer)

[O]

#13
Front (Question)

Dehydration is what type of reaction

Back (Answer)

Elimination reactions

#14
Front (Question)

When alcohols are dehydrated what is formed

Back (Answer)

Alkenes

#15
Front (Question)

Dehydration of alcohols

Back (Answer)

Alcohol heated under reflux in presence of acid catalyst (concentrated sulphuric acid)

#16
Front (Question)

Alcohols and Hydrogen halides react in what type of reaction forming what

Back (Answer)

Substitution reaction forming haloalkanes + H2O

#17
Front (Question)

Alcohols react with hydrogen halides in substitution reactions to form halo alkanes

Back (Answer)

Alcohol is heated under reflux with sulphuric acid and sodium bromide NaBr+H2SO4–>HBr+NaHSO4 HBr formed in this reaction reacts with the alcohol C2H5OH+HBr—>C2H5Br+H2O C2H5OH+NaBr+H2SO4–>C2H5Br+H2O+NaHSO4