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

• Explosive

• Corrosive

• Irritant

• High level Irritant

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

• Able to turn blue litmus paper red

• Corrosive

• Sour

• Sweet

Acids are source of

• hydrogen ions

• hydroxide ions

Alkalis are source of

• hydrogen ions

• hydroxide ions

Acid in our stomach:

• Hydrochloric acid

• Sulfuric acid

• Acetic acid

• Carbonic acid

Acid in car battery:

• Hydrochloric acid

• Sulfuric acid

• Acetic acid

• Carbonic acid

Which substance is alkali?

• Toothpaste

• Vinegar

• Lemon juice

• Soft drink

The color of litmus in acid:

• Red

• Blue

• Purple

• Green

The color of litmus in alkali:

• Red

• Blue

• Purple

• Green

The color of litmus in neutral solution:

• Red

• Blue

• Purple

• Green