Acids and Alkalis

_{What is the hazard shown in this hazard sign?}

• Explosive

• Corrosive

• Irritant

• High level Irritant

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

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

• Able to turn blue litmus paper red

• Corrosive

• Sour

• Sweet

The pH scale is a range from:

• 1-7
• 0-14
• 1-14
• 1-20

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

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

• Milk
• Orange Juice
• Water
• Blood

A solution with a pH of 3.6 would be...

• Acid
• Base
• Neutral
• Acid and Base