Identification of Anions

What is the charge of anions?

• positive

• negative

• neutral

• free of charge

Which of the following are anions?

• ammonium ion

• chloride ion

• carbonate ion

• sulfate ion

When dilute acid was added to an unknown sample, effervescence was observed. Which anion is present?

• ammonium ion

• carbonate ion

• nitrate ion

• sulfate ion

As a gas was bubbled through limewater, this was observed. What is the identity of the gas?

• hydrogen

• ammonia

• oxygen

• carbon dioxide

A colourless pungent gas turns damp red litmus paper blue. What is the identity of the gas?

• hydrogen

• ammonia

• oxygen

• carbon dioxide

When dilute nitric acid, followed by silver nitrate solution was added to an unknown sample, a white precipitate was observed. Which anion is present?

• chloride ion

• carbonate ion

• nitrate ion

• sulfate ion

When dilute nitric acid, followed by barium nitrate solution was added to an unknown sample, a white precipitate was observed. Which anion is present?

• chloride ion

• carbonate ion

• nitrate ion

• sulfate ion

When dilute nitric acid, followed by silver nitrate solution was added to an unknown sample, a white precipitate was observed. What is the white precipitate formed?

• silver chloride

• silver carbonate

• silver nitrate

• silver sulfate

When dilute nitric acid, followed by barium nitrate solution was added to an unknown sample, a white precipitate was observed. What is the white precipitate formed?

• barium chloride

• barium carbonate

• barium nitrate

• barium sulfate

As a gas was bubbled through limewater, this was observed. What is the correct way to describe it?

• white cloudy emulsion

• white chalky solution

• white milky solution

• white precipitate formed in limewater