Organic Tests and reaction

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Test for phenolic compounds / phenol

Back (Answer)

Add aqueous iron III chloride- Purple colour or solution present

Front (Question)

Test for a carboxylic acid

Back (Answer)

Add sodium carbonate Fizzing seen with co2 (bubbles))

Front (Question)

Test for an alcohol

Back (Answer)

I2/ NaOH (aq) CH3CHOH group Yellow PPT Antiseptic smell

Front (Question)

Test for an aldehyde x2

Back (Answer)

Tollens (AgNO3/NH3 complex) Silver mirror result Fehlings (CuSO4 complex) - blue to red colour change result Both redox

Front (Question)

Test for aldehydes and ketones

Back (Answer)

24DNP- orange crystals with high melting points (NUCLEOPHILIC addition/elimination) I2/NaOH A -CH3CO group yellow ppt anti septic smell

Front (Question)

Distinguishing between aliphatic and aromatic amines

Back (Answer)

1- add nitrous acid to both in cold conditions Bubbles nitrogen gas seen with aliphatic, no bubbles with aromatic 2- add nitrous acid to both in cold alkaline conditions, add an aromatic compound eg phenol. A colour is produced with aromatic, no colour with aliphatic

Front (Question)

Identifying an ester

Back (Answer)

Hydrolysis reaction- forms a carboxylic acid (and alcohol) in the form of a colourless solution (aliphatic ester) or White PPT (aromatic )

Front (Question)

Identifying a basic compound

Back (Answer)

Red litmus paper- turns blue

Front (Question)

Identifying an acidic compound

Back (Answer)

Turns blue litmus paper red

#10

Front (Question)

Identifying an amide or nitrile

Back (Answer)

Alkane hydrolysis- produce ammonia NH3 gas that turns red litmus blue

#11

Front (Question)

Distinguishing between aromatic and aliphatic acids

Back (Answer)

Their solubility in. Water- aliphatic acids are soluble so produce a colourless soliton (no white ppt) Aromatic acids produce white ppt (insoluble/sparingly)

#12

Front (Question)

Nitrating benzene

Back (Answer)

Concentrated sulfuric and nitric acid 55degrees

#13

Front (Question)

Halogenising benzene

Back (Answer)

No light; room temp: anhydrous

#14

Front (Question)

Alkylation of benzene

Back (Answer)

Room temp , anhydrous

#15

Front (Question)

Delocalisation energy calculation of benzene

Back (Answer)

Calculate delta H One is experimental, one is theoretical The difference between them is the DE

#16

Front (Question)

If aqueous sodium borohydride is used to reduce Unknown compounds at room temp: what are they going to be?

Back (Answer)

Aldehydes or ketones because it only reduces these

#17

Front (Question)

Why is phenol more subseptible to Electrophilic substitution (addition of bromine/bromine water)

Back (Answer)

Catalyst isn’t required Conc bromine not required Mono subsituted product not produced

#18

Front (Question)

Production of an aromatic ester from phenol

Back (Answer)

Reaction with ethanoyl chloride - NUCLEOPHILIC substitution

#19

Front (Question)

Method to identify an aldehyde ketone using DNP

Back (Answer)

1 add unknown to dnp in dilute acid 2- orange crystals form 3- filter and wash with cold solvent 4- dry and take the MP and compare with literature value

#20

Front (Question)

Oxidation reactions reagent and observation

Back (Answer)

Acidification potassium dichromate (aqueous sulfuric acid used) Orange to green colour change Not with ketones though as they’re not easily oxidised

#21

Front (Question)

What is produced in the hydrolysis of acid chlorides

Back (Answer)

Carboxylic acid

#22

Front (Question)

Is the sodium salt for benzoicacid soluble?

Back (Answer)

Yes

#23

Front (Question)

How do you obtain a carboxylic acid from salt?

Back (Answer)

Add strong acid

#24

Front (Question)

How do you isolate a product eg carboxylic acid?

Back (Answer)

Filter Wash with cold solvent Recrystallise from hot water Dry in oven below MP