Acids and Alkalis revision

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

What substance could you use to test if a substance is an acid or alkali?

• Indicator
• Salt
• Catalyst
• Water

What is the pH of distilled water?

• pH 12

• pH 3

• pH 8

• pH 7

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

• Blue

• Red

• Green

• Colourless

What colour does litmus paper turn when added to an acid?

• Blue

• Red

• Green

• Colourless

What other laboratory substance can you use to test if colourless substance is an acid or an alkali?

• Catalyst

• Salt

• Universal Indicator

• Water

A wasp sting is alkali. Which substance would neutralise the sting?

• Vinegar

• Bleach

• Baking soda

• Distilled water

Antacids are used to help indigestion by neutralising stomach acid. What substances is in the medicine?

• Acid

• Alkali

• Neutral

If you wanted to test a colourless and odourless substance at home, what household item could you use?

• Red cabbage water

• Bleach

• Water

• Vinegar