Why do we see water droplets on the outer surface of a glass containing ice-cold water
The air around ice-cold water container contains water vapours which have higher energy than ice-cold water. Therefore, water vapour present in the air loses energy when come in contact with cold water. These are then converted into liquid state, which we see as water droplets.
Convert the following temperatures to Kelvin scale
25°C
What is the physical state of water at
100 °C
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
What is the physical state of water at
100°C
Mock Test Series
