Cation + Flame test

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+

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 green ppt forms. The formula of the ion is:

• Fe2+
• Fe3+
• Cu2+
• Na+

Anyhdrous copper sulphate is added to water. The colour change is from:

• White-Blue
• Pink-Blue
• Blue-Pink
• Blue-White

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

Test for sulphate ions is...

• Add acid or barium chloride

• Add barium chloride or barium nitrate

• Add silver nitrate or barium nitrate

• Add barium chloride or silver nitrate

A colourless and pungent gas is tested with damp red an blue litmus paper. The blue litmus paper remains blue, while the red litmus paper changes to blue. What is the identity of the gas?

• Ammonia

• Hydrogen chloride

• Chlorine

• Oxygen