Dissolving Sugar in Water: A Physical Change

The video demonstrates that dissolving sugar in water is a physical change. It explains that the sugar molecules remain present in the water, as evidenced by the sweet taste. An experiment is conducted where sugar is dissolved in water, and then the solution is evaporated, leaving a white residue identical to the original sugar. This shows that no new substance is formed, confirming that the process is a physical change.

What is the main concept being discussed in the video?

• Formation of new substances

• Physical change of sugar in water

• Chemical change of sugar in water

• Change in color of sugar

What happens to the taste of water when sugar is dissolved in it?

• It becomes salty

• It becomes bitter

• It remains tasteless

• It becomes sweet

What is obtained after evaporating the sugar solution?

• A white residue

• A yellow residue

• No residue

• A black residue

What does the white residue obtained after evaporation indicate?

• The water has changed properties

• The sugar remains unchanged

• The sugar has chemically changed

• A new substance is formed

Why is dissolving sugar in water considered a physical change?

• Because it forms a new substance

• Because the water changes color

• Because the sugar molecules disappear

• Because no new substance is formed