Chapter 6 Chemical analysis (6.3-6.5)

What is the test for hydrogen?

• relight a glowing splint

• cloudy limewater

• bleaches damp litmus paper

• squeaky pop

What is the test for oxygen?

• relight a glowing splint

• cloudy limewater

• bleaches damp litmus paper

• squeaky pop

What is the test for carbon dioxide?

• relight a glowing splint

• cloudy limewater

• bleaches damp litmus paper

• squeaky pop

What is the test for chlorine?

• relight a glowing splint

• cloudy limewater

• bleaches damp litmus paper

• squeaky pop

What is the test for ammonium gas (NH₃)?

• turns damp red litmus blue

• turns limewater milky

• bleaches damp litmus paper

• 'pops' with a lighted splint

Silver nitrate and Nitric acid were mixed with an unknown solution. A white ppt formed. The formula of the ion present is

• Br-
• Cl2
• Cl-
• Br2

Silver nitrate and Nitric acid were mixed with an unknown solution. A cream ppt formed. The formula of the ion present is

• I-
• Br+
• Br-
• Cl+

Silver nitrate and Nitric acid were mixed with an unknown solution. A yellow ppt formed. The formula of the ion present is

• I2
• I+
• I-
• Br-

NaOH is added to an unknown solution. A blue ppt forms. The formula of the ion is:

• Fe
• Fe3+
• Fe2+
• Cu2+

NaOH is added to an unknown solution. A orange-brown ppt forms. The formula of the ion is:

• Fe2+
• Fe3+
• Cu2+
• Cl-