tests

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

Card preview (24)

Front (Question)

test for carbon dioxide

Back (Answer)

turns limewater milky

Front (Question)

test for oxygen

Back (Answer)

relights glowing splint

Front (Question)

test for hydrogen

Back (Answer)

pops a lighted splint

Front (Question)

test for ammonia

Back (Answer)

turns dap red litmus paper blue

Front (Question)

test for sulfur dioxide

Back (Answer)

turns acidified aqueous potassium magnate from purple to colourless

Front (Question)

test for hydrochloric acid

Back (Answer)

turns blue litmus paper red

Front (Question)

test for chlorine gas

Back (Answer)

damp blue litmus paper turns red then bleaches

Front (Question)

NaOH or ammonia method for test for cations

Back (Answer)

Metal cations in aqueous solution can be identified by the colour of the precipitate they form on addition of sodium hydroxide and ammonia If only a small amount of NaOH is used then normally the metal hydroxide precipitates In excess NaOH some of the precipitates may dissolve A few drops of NaOH is added at first and any colour changes or precipitates formed are noted Then the NaOH is added in excess and the reaction is observed again The steps are repeated for the test using ammonia solution

Front (Question)

results for test for cations

Back (Answer)

see table https://docs.google.com/document/d/1FEuoHGrHnAgaCxSHhz8YD89lbgVijgTnlItPZ4HTruU/edit

#10

Front (Question)

Lithium cation flame test

Back (Answer)

red flame

#11

Front (Question)

Sodium cation flame test

Back (Answer)

yellow flame

#12

Front (Question)

potassium cation flame test

Back (Answer)

lilac flame

#13

Front (Question)

Calcium (2+) cation flame test

Back (Answer)

orange-red flame

#14

Front (Question)

Copper (2+) flame test

Back (Answer)

blue-green flame

#15

Front (Question)

test for carbonate anion

Back (Answer)

• add dilute acid - test the released gas

#16

Front (Question)

result for carbonate anion

Back (Answer)

effervescence, gas produced is CO2 which turns limewater milky

#17

Front (Question)

test for chloride anion

Back (Answer)

acidify with dilute nitric acid and add aqueous silver nitrate

#18

Front (Question)

result for chloride anion

Back (Answer)

white ppt

#19

Front (Question)

test for bromide anion

Back (Answer)

acidify with dilute nitric acid and add aqueous silver nitrate

#20

Front (Question)

result for bromide anion

Back (Answer)

cream ppt

#21

Front (Question)

test for iodide anion

Back (Answer)

acidify with dilute nitric acid and add aqueous silver nitrate

#22

Front (Question)

result for iodide anion

Back (Answer)

yellow ppt

#23

Front (Question)

test for nitrate anion

Back (Answer)

add aqueous NaOH and aluminium foil, warm gently and test the gas released

#24

Front (Question)

result for nitrate anion

Back (Answer)

gas given off is ammonia, has a pungent smell and turns moist red litmus paper blue