S1 Acids, Alkalis and Solutions

What colour is universal indicator in a strong alkali?

• Green
• Orange
• Purple
• Red

What colour is universal indicator in a neutral solution?

• Green
• Orange
• Purple
• Red

What colour is universal indicator in strong acid?

• Green
• Orange
• Purple
• Red

Tags

NGSS.MS-PS1-2

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

• Able to turn blue litmus paper red

• Corrosive

• Sour

• Sweet

What is the only substance with a neutral pH of 7?

• Milk
• Orange Juice
• Water
• Blood

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 happens to the pH of an acid during neutralisation?

• It stays the same

• It moves toward pH 1

• It moves towards pH 7

• It moves towards pH 14

Tags

NGSS.MS-PS1-2

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

• Vinegar

• Bleach

• Baking soda

• Distilled water

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

• Red cabbage water

• Bleach

• Water

• Vinegar