Acid and Alkali

Which of the following substances contain acid?

• An orange
• Bleach
• Distilled water
• Washing powder

Which of the following substances contain an alkali?

• Baking powder
• Coca cola
• Distilled water
• Vinegar

Which of the following pH numbers indicates a neutral substance?

• 1
• 5
• 7
• 14

Which of the following pH numbers indicates a strong acid?

• 1
• 5
• 7
• 14

Which of the following pH numbers indicate a strong alkali?

• 1
• 5
• 7
• 14

What colour is universal indicator in a strong alkali?

• Green
• Orange
• Purple
• Red

Strong acids and strong alkalis are.......

• Able to turn blue litmus paper red
• Corrosive and/or caustic
• Sour
• Sweet

What colour does pH paper turn when added to an alkali?

• Blue/Purple
• Red/orange
• Green
• Colourless

What is the pH of pure water?

• pH 7
• pH 3
• pH 12
• pH 8

What happens to the pH of a acid during neutralisation?

• It stays the same
• It moves up towards pH 7
• It moves down to pH 1
• It lowers