7C Air and Gas Tests

What is the test for HYDROGEN gas?

• Put near a flame - makes a squeaky pop!

• Put in a glowing splint - the splint relights!

• Bubble through Lime Water - goes from clear to cloudy!

• Put in a burning splint - the splint goes out!

• Add to Anhydrous Copper Sulfate - goes from white to blue!

What is the test for OXYGEN gas?

• Put near a flame - makes a squeaky pop!

• Put in a glowing splint - the splint relights!

• Bubble through Lime Water - goes from clear to cloudy!

• Put in a burning splint - the splint goes out!

• Add to Anhydrous Copper Sulfate - goes from white to blue!

What is the test for CARBON DIOXIDE gas?

• Put near a flame - makes a squeaky pop!

• Put in a glowing splint - the splint relights!

• Bubble through Lime Water - goes from clear to cloudy!

• Put in a burning splint - the splint goes out!

• Add to Anhydrous Copper Sulfate - goes from white to blue!

What is the test for WATER VAPOUR?

• Put near a flame - makes a squeaky pop!

• Put in a glowing splint - the splint relights!

• Bubble through Lime Water - goes from clear to cloudy!

• Put in a burning splint - the splint goes out!

• Add to Anhydrous Copper Sulfate - goes from white to blue!

What is the percentage of NITROGEN in the Air?

• 0.03%

• 1%

• 21%

• 78%

What is the percentage of OXYGEN in the Air?

• 0.03%

• 1%

• 21%

• 78%

What is the percentage of ARGON in the Air?

• 0.03%

• 1%

• 21%

• 78%

What is the percentage of CARBON DIOXIDE in the Air?

• 0.03%

• 1%

• 21%

• 78%

Some steel wool was left in a tube of air, stood in some water. The steel rusts and uses up the OXYGEN. How much would the water rise (to take the oxygen's place)?

• 1/10 the tube

• 1/5 the tube

• 1/2 the tube

• the water would not rise

Select ALL of the correct answers about air...

• Air is a mixture

• Air contains Atoms of an elelemt

• Air contains Molecules of elements

• Air contains Molecules of compounds