Gas Test

Between the following test tubes, which litmus solution will turn to red?

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• 
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When salt X is heated, a brown gas is produced. What is the brown gas?

• Sulphur dioxide

• Carbon dioxide

• Zinc chloride

• Nitrogen dioxide

Which test would be most appropriate to confirm that chlorine gas was produced?

• collect the gas and see if it extinguishes a glowing splint

• collect the gas and check if it is green

• collect the gas and check if it bleaches damp litmus paper

• collect the gas and check if it smells of swimming pools

Which if the correct method for testing for hydrogen gas?

• Hold the tube containing the gas upright and place a lighted wooden splinter at the end of the tube.

• Hold the tube containing the gas upright and place a glowing splint at the end of the tube.

• Hold the tube containing the gas angled down and place a lit splint at the end of the tube.

• Hold the tube containing the gas angled down and place a glowing splint at the end of the tube.

Which is not true about the test for carbon dioxide gas?

• the gas is bubbled through limewater solution.

• Limewater is calcium hydroxide solution.

• The solution will turn cloudy due to the formation of a white precipitate.

• the colour will fade after a few minutes.

What is the correct observation when a glowing wooden splinter is held at the entrance of a tube of pure oxygen gas?

• A 'squeaky pop' sound can be heard

• The glowing woonden splinter will relights

• The glowing wooden splinter is immediately extinguished.

Use the clue to identify the mystery gas:

When a lighted wooden splinter is placed near the opening of a test tube containing the gas, a popping sound is heard.

• Carbon dioxide

• Chlorine

• Hydrogen

• Oxygen

Which of the following statements is correct for the test of carbon dioxide?

• it changes limewater from milky to colourless

• it changes limewater from colourless to pink

• it changes limewater from colourless to milky

Which of the following statements is correct for the test of hydrogen gas?

• It relights a glowing wooden splinter

• It gives a pop sound with a glowing wooden splinter

• It gives a pop sound with a lighted wooden splinter

Which of the following chemicals is used in the test for ammonia gas?

• Concentrated nitric acid

• Concentrated hydrochloric acid

• Concentrated sulphuric acid