All about Acids and Bases

Name the two products formed when an acid reacts with an alkali.

• water and carbon dioxide

• water and salt

• hydrogen and salt

• hydrogen and water

Name the gas produced when acids react with metals.

• hydrogen

• oxygen

• carbon dioxide

• nitrogen

When acids react with carbonates, a gas is produced.

How do you test the gas produced?

• lighted splint

• red litmus paper

• blue litmus paper

• limewater

What happen to the blue litmus paper when the paper is dipped into a neutral solution?

• Turns red

• No effect

When the Universal Indicator remains green in solution X, this shows that solution X is

• acidic

• alkaline

• neutral

• either acidic or alkaline

Which statement(s) is correct about the acids?

You can choose more than one answer, if any.

• Acids are corrosive.

• Acids taste bitter.

• Acids have soapy feeling.

• Acids involve in neutralisation process.

• Acids turn red litmus paper blue.

When hydrochloric acid is used to react with metal, the salt produced is called sulfate salt.

• True

• False

The values of pH scale range from

• 0 to 10

• 0 to 12

• 1 to 10

• 1 to 14