test for gases Flashcards
1
Q
ammonia
A
turns moist red litmus paper blue
2
Q
CO2
A
forms white ppt with limewater (ppt dissolves with excess CO2)
3
Q
Cl2
A
turns moist blue litmus paper red then bleaches it
4
Q
H2
A
extinguished lighted splint with “pop” sound
5
Q
O2
A
relights glowing splint
6
Q
SO2
A
turns acidified aqueous potassium manganate(VII) from purple to colourless