WATER

Open Ended

What do you think would happen if there were no sources of natural water like rain, rivers, or lakes?

Multiple Choice

Why is water referred to as the universal solvent?

• Because it can dissolve many substances

• Because it is always pure

• Because it is only found in rivers

• Because it is used for drinking

Multiple Choice

Which property of water allows it to dissolve more substances than any other solvent?

• It is a binary compound

• It is a universal solvent

• It is neutral to litmus

• It has a maximum density at 4°C

Open Ended

Explain how the molecular structure of water contributes to its polarity.

Multiple Select

Which of the following are physical properties of water?

• Boils at 100°C

• Maximum density at 4°C

• Neutral to litmus

• Reacts with all metals

Open Ended

Describe how hydrogen bonding affects the surface tension of water.

Fill in the Blanks

The exceptional boiling and melting points of water are mainly due to the presence of

bonds.

Multiple Choice

Which metals react with cold water to form alkalis and liberate hydrogen gas?

• Sodium, potassium, calcium

• Magnesium, zinc, iron

• Gold, silver, copper

• Mercury, iron, zinc

Multiple Choice

Which of the following non-metals reacts with steam at red heat to form an oxide and liberate hydrogen gas?

• Carbon

• Nitrogen

• Chlorine

• Sulfur

Fill in the Blanks

When a few drops of water are added to white anhydrous copper (II) tetraoxosulphate, the colour changes to

Open Ended

Reflecting on today's lesson, what are some sources of water you encounter in your daily life, and why is it important to know the difference between natural and treated water?

Multiple Choice

What is meant by the term 'universal solvent' in relation to water?

• A solvent that can dissolve only a few substances

• A solvent that can dissolve many substances

• A solvent that cannot dissolve any substances

• A solvent that is found only in laboratories