(a)
Interpretation:
Pressurised can on coming in contact with fire expodes should be identified.
Concept introduction:
Kinetic theory explains the fact:
- Movement of gaseous particles occur fastly at higher temperature.
- compression of gas can be easily dealt in comparison to solid or liquid
- The particle of gases are very small and is far from each other.
The pressure is direct propotional to temperature as follows:
PV = n R T
The pressure increases on increasing the temperature while it decreases on decreasing the temperature.
(b)
Interpretation:
Hot air balloon rise up should be identified.
Concept introduction:
Kinetic theory explains the fact:
- Movement of gaseous particles occur fastly at higher temperature.
- compression of gas can be easily dealt in comparison to solid or liquid
- The particle of gases are very small and is far from each other.
The density of gases are lower than liquid and solid.
(c)
Interpretation:
Smell of an onion can be smelled from far should be identified.
Concept introduction:
Kinetic theory explains the fact:
- Movement of gaseous particles occur fastly at higher temperature.
- compression of gas can be easily dealt in comparison to solid or liquid
- The particle of gases are very small and is far from each other.
The density of gases are lower than liquid and solid.
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