Acids and Alkali

The image shows a PH scale. Which option indicates strong alkali?

• a

• b

• c

• d

The pH scale is a range from:

• 1-7

• 0-14

• 1-20

Alkalis feel...

• Rough

• Soapy

• Granulated

• Smooth

What does this warning symbol mean?

• Toxic

• Corrosive

• Flammable

• Irritant

What does this warning symbol mean?

• Toxic

• Corrosive

• Flammable

• Irritant

What colour is universal indicator in a strong alkali?

• Green
• Orange
• Purple
• Red

What can turmeric and red cabbage be used for?

• To look pretty

• As an indicator

• As a test for an acid

• As a test for acid rain

An alkali can neutralize an acid

• False

• True

Complete the word equation below:

Acid + alkali --> ............... + water

• water

• salt

• gold

• metal

What type of reaction occurs when you react an acid with an alkali?

• combustion

• decomposition

• no reaction

• neutralisation