Chemical Analysis

Which method should be used to test for hydrogen gas?

• Place a lit splint in the end of the test tube.

• Place a glowing splint at the end of the test tube.

• Place damp blue litmus paper in the end of the test tube.

• Bubble the gas through limewater.

Which method should be used to test for oxygen gas?

• Place a lit splint in the end of the test tube.

• Place a glowing splint at the end of the test tube.

• Place damp blue litmus paper in the end of the test tube.

• Bubble the gas through limewater.

Which method should be used to test for chlorine gas?

• Place a lit splint in the end of the test tube.

• Place a glowing splint at the end of the test tube.

• Place damp blue litmus paper in the end of the test tube.

• Bubble the gas through limewater.

Which method should be used to test for carbon dioxide gas?

• Place a lit splint in the end of the test tube.

• Place a glowing splint at the end of the test tube.

• Place damp blue litmus paper in the end of the test tube.

• Bubble the gas through limewater.

Fred is testing an unknown gas. He places a lit split at the end of a test tube containing this gas. The lit splint goes out and Fred hears a 'squeaky pop'. Which gas was in the test tube?

• Hydrogen

• Oxygen

• Chlorine

• Carbon dioxide

Paula is testing an unknown gas. She places a glowing split at the end of a test tube containing this gas. The glowing splint relights. Which gas was in the test tube?

• Hydrogen

• Oxygen

• Chlorine

• Carbon dioxide

Tim is testing an unknown gas. He places a piece of damp blue litmus paper into end of a test tube containing this gas. The blue litmus paper goes red then white. Which gas was in the test tube?

• Hydrogen

• Oxygen

• Chlorine

• Carbon dioxide

Zoe is testing an unknown gas. She bubbles the gas through a tube into a container of limewater. The limewater goes cloudy. Which gas was in the test tube?

• Hydrogen

• Oxygen

• Chlorine

• Carbon dioxide

The picture shows the results of chromatography of a purple felt tip pen. How many different ink colours have been used to make the purple colour?

The picture shows the results of chromatography of a purple felt tip pen. Which ink colour is the most soluble?

• purple

• red

• light blue

• dark blue