IGCSE Chemistry ss 1

Which of the following is a property of acids?

• Slippery feel

• Bitter taste

• Turns blue litmus red

• Turns red litmus blue

A base is a substance that:

• Tastes sour

• Releases H⁺ in water

• Turns red litmus blue

• Is always a solid

Which of the following is a strong acid?

• H₂SO₄

• CH₃COOH

• H₂CO₃

• HNO₂

Which of the following is a weak base?

• NaOH

• KOH

• NH₄OH

• Ca(OH)₂

Acids react with metals to produce:

• Salt only

• Salt and hydrogen gas

• Water and oxygen

• Metal oxides

What is the pH of a neutral solution?

• 1

• 7

• 10

• 14

Which of the following is used to measure pH?

• Thermometer

• Litmus paper

• Barometer

• Stopwatch

Which acid is present in vinegar?

• Sulfuric acid

• Nitric acid

• Hydrochloric acid

• Acetic acid

A basic oxide reacts with an acid to form:

• Another base

• A salt and water

• An acid

• A gas

Sodium hydroxide is also called:

• Quicklime

• Caustic soda

• Baking soda

• Bleaching powder