Chemical Tests

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

Card preview (24)

Front (Question)

Test for aldehydes/ ketones

Back (Answer)

Tollens reagent -Aldehyde forms silver mirror -Ketone no visible change Fehlings solution (warm) -Aldehyde forms brick red ppt -Ketone no visible change

Front (Question)

Test for alcohols

Back (Answer)

Acidified potassium dichromate -Primary and secondary turn green from orange -Tertiary have no visible change

Front (Question)

Test for alkenes

Back (Answer)

Bromine water -Alkenes turn colourless from orange -Alkanes have no visible change

Front (Question)

Test for carboxylic acid

Back (Answer)

Sodium carbonate -effervescence -gas produced turns limewater cloudy (CO2)

Front (Question)

Test for halide ion

Back (Answer)

Warm with Silver Nitrate and Nitric acid. - chlorine: white ppt (dissolves in dilute NH3) - bromine: cream ppt (dissolves in conc NH3) - iodine: yellow ppt (insoluble with conc NH3)

Front (Question)

Potassium halides (KCl, KBr, KI) with conc H2SO4

Back (Answer)

-KCl: white steamy fumes -KBr- orange fumes -KI: purple fumes+ purple/ black solid All turn blue litmus paper red

Front (Question)

Test for SO4 2-

Back (Answer)

Acidify with HCl and add BaCl White ppt of BaSO4

Front (Question)

Test for CO3 2-

Back (Answer)

Dilute HCl Effervescence and gas produced turns limewater cloudy

Front (Question)

Test for OH-

Back (Answer)

damp red litmus paper turns from red to blue

#10

Front (Question)

Test for Mg 2+

Back (Answer)

Dilute NaOH forms white ppt which doesnt change in excess Dilute H2SO4 has no visible change Dilute NH3 forms white ppt which doesnt change in excess

#11

Front (Question)

Test for Ca 2+

Back (Answer)

Flame test- brick red Dilute NaOH forms white ppt Dilute H2SO4 forms slight white ppt

#12

Front (Question)

Test for Sr 3+

Back (Answer)

Flame test- red Dilute NaOH has no visible change Dilute H2SO4 forms white ppt

#13

Front (Question)

Test for Ba 2+

Back (Answer)

Flame test- green Dilute NaOH has no visible change Dilute H2SO4 forms white pt

#14

Front (Question)

Test for NH4 +

Back (Answer)

NaOH, warm, damp red litmus paper turns blue

#15

Front (Question)

Test for Co2+

Back (Answer)

Add NH3 dropwise to excess Pink solution goes to a blue/green ppt goes to a yellow solution

#16

Front (Question)

Test for Cu2+

Back (Answer)

Add dilute NaOH. Forms a pale blue ppt. No change in excess. Add dilute NH3. Forms a pale blue ppt which turns to dark blue in excess. Add Na2CO3. Forms a green/blue ppt. Add NaCl. Forms a yellow solution.

#17

Front (Question)

Appearence of Cu2+ aqua ion

Back (Answer)

Pale blue solution

#18

Front (Question)

Test for Fe2+

Back (Answer)

Add dilute NaOH. Forms a green ppt which doesnt change in excess. Add dilute NH3. Forms a green ppt which doesnt change in excess. Add Na2CO3. Forms a green ppt.

#19

Front (Question)

Appearence of Fe2+ aqua ion

Back (Answer)

Green solution

#20

Front (Question)

Test for Fe3+

Back (Answer)

Add dilute NaOH. Forms orange/ brown ppt which doesnt change in excess. Add dilute NH3. Forms orange/ brown ppt which doesnt change in excess. Add Na2CO3. Forms orange/ brown ppt and effervescence.

#21

Front (Question)

Appearence of Fe3+ aqua ion

Back (Answer)

Purple but may look yellow/ brown soution

#22

Front (Question)

Test for Al3+

Back (Answer)

Add dilute NaOH. Forms a white ppt which redissolves into a colourless solution in excess. Add dilute NH3. Forms a white ppt which doesnt change in excess. Add Na2CO3. Forms white ppt and effervescence.

#23

Front (Question)

Appearence of AL3+ aqua ion

Back (Answer)

Colourless solution

#24

Front (Question)

Test for halogenoalkane

Back (Answer)

Add NaOH and warm. Acidify with nitric acid. Add silver nitrate. Precipitate of AgX forms. AgCl is white AgI is yellow AgBr is cream