Question

Choose the incorrect statement.

• A. All liquids have their boiling point at ${100}^o$C
• B. Liquids can be converted to solid state below their freezing point.
• C. Washing clothes is a slow change.
• D. Evaporation can occur at any temperature.

Answer 1

The correct option is A

All liquids have their boiling point at ${100}^o$C

• All liquids do not have boiling point at ${100}^o$C. It is only water which boils at ${100}^o$C and at atmospheric pressure.
• Every liquid has a unique freezing point, below which its state changes to solid.
• We wash clothes to remove dirt and grime. For this, we add soap/detergent and wash them for a considerable time.
• Evaporation is a process which happens only at the surface of a liquid. It can occur at any temperature.