Testing for gases

• What is the first step to test for hydrogen gas?

  Remove the bung and insert a burning splint
• What sound indicates the presence of hydrogen gas?

  A pop sound when it burns
• What is used to test for oxygen gas?

  A glowing splint
• What happens to a glowing splint in oxygen gas?

  It bursts into flames
• What is the test for carbon dioxide gas?

  Use lime water
• What is lime water?

  Aqueous solution of calcium hydroxide
• How do you test for carbon dioxide using lime water?

  Bubble the gas through lime water
• What indicates that carbon dioxide is present in lime water?

  The lime water turns cloudy
• What is the test for chlorine gas?

  Insert damp litmus paper into the test tube
• What effect does chlorine have on litmus paper?

  It bleaches the paper and turns it white
• Where can you find more questions on testing for gases?

  In the vision workbook