C12 Chemical analysis Trilogy AQA #ForestHorsham

How do you test for hydrogen gas?

• Relight a glowing splint
• Makes a squeaky pop with a lit splint
• Turns limewater milky
• Bleaches damp limtus paper

How do you test for oxygen gas?

• Makes a squeaky pop with a lit splint
• Relights a glowing splint
• Bleaches damp litmus paper
• Turns limewater milky

How do you test for carbon dioxide gas?

• Turns limewater milky
• Relights a glowing splint
• Makes a squeaky pop with a splint
• Bleaches damp litmus paper

How do you test for Chlorine gas?

• Bleaches damp litmus paper
• Makes a squeaky pop with a lit splint
• Relights a glowing splint
• Turns limewater milky

Which gas bleaches a damp litmus paper ?

• Hydrogen
• Ammonia
• Chlorine
• Carbondioxide

To test for gas is to

• observe the colour and odour of the gas

• test with litmus paper

• carry out specific test to identify gas

• all of the above

Define "compound"

• Two or more elements chemically bonded together

• Two or more elements or compounds not chemically bonded together

• one element or compounds only

• two atoms chemically bonded

Define "mixture"

• Two or more elements chemically bonded together

• Two or more elements or compounds not chemically bonded together

• one element or compounds only

• two atoms chemically bonded

Define a pure substance

• Two or more elements mixed together

• Two or more elements or compounds not chemically bonded together

• One element or compound only

• A solid

How do you calculate Rf value in chromatography?

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