Gas Tests

What is the test for carbon dioxide gas?

• Passing through limewater

• Mixing with water

• Adding to hydrochloric acid

• Heating with a Bunsen burner

How does limewater react when carbon dioxide is passed through it?

• Yellow precipitate of calcium carbonate is formed.

• Red precipitate of calcium carbonate is formed.

• White precipitate of calcium carbonate is formed.

• No reaction occurs.

What is the test for oxygen gas?

• Burning with a bright green flame

• Relighting of a glowing splint

• Color change in a pH indicator solution

• Formation of a white precipitate

Which gas relights a glowing splint?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon dioxide

What is the test for hydrogen gas?

• Ignites with a 'pop' sound

• Fizzes when exposed to air

• Turns blue litmus paper red

• Forms a white precipitate with silver nitrate

How does hydrogen gas burn?

• Hydrogen gas burns by combining with oxygen in the air.

• Hydrogen gas burns by turning into a solid form.

• Hydrogen gas burns by emitting water vapor.

• Hydrogen gas burns by exploding violently.

What happens when hydrogen gas is passed over a hot copper oxide?

• Formation of copper metal and hydrogen gas

• Formation of copper oxide and hydrogen gas

• No reaction occurs

• Reduction of copper oxide to copper metal and oxidation of hydrogen gas to form water vapor

What is the product formed when hydrogen gas reacts with oxygen?

• Hydrogen peroxide

• Hydrogen chloride

• Hydrogen sulfate

• Water

How can you test for the presence of hydrogen gas?

• Use a lit matchstick and observe if the gas ignites

• Pour water on the gas and see if it bubbles

• Shine a flashlight on the gas and check for a reaction

• Use a lighted splint and observe if the gas burns with a 'pop' sound.

What is the test for the presence of oxygen gas?

• Glowing splint test

• Spark test

• Flame test

• Burning splint test