Acids and Alkalis

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

Strong acids and alkalis are...

• Sour

• Sweet

• Corrosive/Caustic

• Burn litmus paper

Which of the following is a common property of acids?

• They taste bitter.

• They turn blue litmus paper red.

• They feel slippery.

• They are unreactive with metals.

Which of the following is a property of acids?

• They feel slippery.

• They taste sour.

• They turn red litmus paper blue.

• They are unreactive with metals.

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

What is the pH range of acids?

• 0-7

• 7-14

• 7

• 14-21

Match the following

• Acid

• pH

• Measures acidity

• Low pH (lower than 7)

• Alkaline (base/basic)

• 7 pH

• Neutral

• High pH (more than 7)

Which of the following is a characteristic of bases?

• They taste sour.

• They turn litmus paper red.

• They feel slippery.

• They release hydrogen ions in solution.