testing for gasses

Question 1

hydrogen test

Answer 1

1. remove bung and insert a burning splint
2. if present it will pop

Question 2

oxygen test

Answer 2

1. use glowing splint
2. place in test tube - if present it relights

Question 3

carbon dioxide test

Answer 3

1. bubble gas through lime water
2. if turns cloudy CO2 is present

Question 4

chlorine test

Answer 4

1. insert damp litmus paper into mouth of tube
2. if bleaches then chlorine is present