Acids and alkalis

Acids taste _________________.

• sour
• sweet
• spicy
• bitter

Alkalis belong to a larger group of chemicals known as ______________. 

• bases
• compounds
• solutions
• solvents

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

• a
• b
• c
• d

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

• a
• b
• c
• d

The image shows a PH scale. Which option will you find hosehold soaps and shampoos? 

• a
• b
• c
• d

When placed in an alkaline solution, blue litmus paper will ____________.

• turns red

• remain blue

• change colour

• turns green

When placed in an alkaline solution, red litmus paper will ____________.

• turn blue

• remain blue

• change colour

• turn green

When placed in an acidic solution, red litmus paper will ____________. 

• turns red
• remains red
• change colour
• turns green

"Universal indicator tell us how acidic or alkaline the solution is." What do you think? 

• True
• False
• Maybe 

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

• Explosive

• Corrosive

• Irritant

• High level Irritant