Gas tests

To test for hydrogen you....

• use a lit splint

• use a glowing splint

• add anhydrous copper sulphate

• bubble the gas through limewater

The positive result for a lit splint test......

• gives a squeaky pop

• shows the presence of hydrogen

• has the splint relights

• has the splint goes out

To test for oxygen gas we use...

• a lit splint

• a glowing splint

• limewater

• red litmus paper

When a glowing splint is put into oxygen we will observe....

• the splint relight

• the splint go out

• a squeaky pop

• no change

Chlorine gas.......

• is acidic

• will turn damp blue litmus red then bleach it white

• is alkaline

• will turn damp red litmus blue

Ammonia gas.......

• is acidic

• will turn damp blue litmus red then bleach it white

• is alkaline

• will turn damp red litmus blue

To test if water is pure we (a)  

To see if water is present we use......

• anhydrous copper sulphate

• hydrated copper sulphate

• copper sulphate

• copper sulphide

A positive test for the presence of water shows what colour change for anhydrous copper sulphate

• white to blue

• blue to white

• pink to blue

• blue to pink

When carbon dioxide is bubbled through limewater a positive result could be described as.....

• colourless to milky

• colourless to cloudy

• a white precipitate forms

• the solution goes clear