Question

Give two reasons to justify:

1. Water at room temperature is liquid.
2. An iron almirah is solid at room temperature

Answer 1

1. Water at room temperature is liquid.

• Water at room temperature is liquid due to the presence of a hydrogen bond.
• These bonds hold water molecules together for a small fraction of a second.
• Molecules move continuously in water.
• The freezing point of water is 0°C and the boiling point is 100°C.

2. An iron almirah is solid at room temperature.

• An iron almirah is solid at room temperature because it has a fixed shape and fixed volume.
• Particles of the iron almirah do not flow freely and have a fixed position.
• Particles have a very high force of attraction between them which makes them solid.