Tests For Gases

Question 0

Hydrogen

Answer 0

Collect using displacement of water or upward delivery (downward displacement) - less dense than air
Test: H2 will burn with a squeaky pop in small amounts

Question 1

Noble gases

Answer 1

Don’t react - no test

Get heavier as you go down the group

Question 2

Oxygen

Answer 2

Collect using displacement of water (create using decomposition of hydrogen peroxide using manganese (4-oxide) dioxide) NOT upward delivery (similar density to air)
Test: glowing splint relights if positive

Question 3

Carbon dioxide

Answer 3

Collect using displacement of water or downwards delivery (upwards displacement) (denser than air)
Create by burning hydrocarbons fully in O2 or acid+carbonate or decomposition of carbonate using heat etc.
Test: bubble through limewater (goes cloudy if positive)

Question 4

Ammonia

Answer 4

Alkaline in solution - turns red litmus paper blue (OH- turns it blue)

Question 5

Chlorine

Answer 5

Bleaches litmus paper white

Poisonous as gas