Acid & alkali-introduction

What is the meaning of the above hazard warning symbol?

• Corrosive

• Explosive

• Toxic

• Radioactive

Which substance is an acid?

• Water

• Bleach

• Orange juice

• Washing powder

Acids taste...

• Sweet

• Salty

• Sour

• Smooth

Alkalis feel...

• Rough

• Granulated

• Soapy

• Smooth

Strong acids and alkalis are...

• Sour

• Sweet

• Corrosive/Caustic

• Burn litmus paper

Which substance is alkali?

• Toothpaste

• Vinegar

• Lemon juice

• Soft drink

Lemon contains acid or alkali or neutral

• Acid

• Alkali

• Neutral

What is an example of neutral

• Vinegar

• Water

• Milk

• Drain cleaner

The other name of alkali is basic

• True

• False

The color of litmus in acid:

• Red

• Blue

• Purple

• Green