Identify the odd one among the following with respect to the principle involved.
Identify the odd one among the following with respect to the principle involved.
The correct option is A Skating on ice.
The principle involved: Condensation is a process of converting the phase of the substance from gas to liquid by loss of energy.
Explanation of the correct option:
- Ice skating is based on the principle of regelation.
- Regelation is the melting of ice under pressure and refreezing when the pressure is reduced. This leads to the smooth movement of the skates on the ice.
Hence option (c) is correct.
Explanation of the incorrect option:
b) Formation of water droplets on the surface of a tumbler filled with ice- When water vapour in the air comes in contact with the cold tumbler surface, it cools down and thus water vapour condenses to form water droplets. This phenomenon is based on condensation.
c) Fogging of exhaled air in winter morning- When the warm exhaled air comes in contact with the outside cold air, the water droplets of the exhaled air condense to form tiny water droplets seen as fog. This phenomenon is based on condensation.
d) Formation of dew- When temperature drops, the water vapour in the air condenses to form dew. This phenomenon is based on condensation.
conclusion: The correct option is a).
Skating on ice.
The principle involved: Condensation is a process of converting the phase of the substance from gas to liquid by loss of energy.
Explanation of the correct option:
- Ice skating is based on the principle of regelation.
- Regelation is the melting of ice under pressure and refreezing when the pressure is reduced. This leads to the smooth movement of the skates on the ice.
Hence option (c) is correct.
Explanation of the incorrect option:
b) Formation of water droplets on the surface of a tumbler filled with ice- When water vapour in the air comes in contact with the cold tumbler surface, it cools down and thus water vapour condenses to form water droplets. This phenomenon is based on condensation.
c) Fogging of exhaled air in winter morning- When the warm exhaled air comes in contact with the outside cold air, the water droplets of the exhaled air condense to form tiny water droplets seen as fog. This phenomenon is based on condensation.
d) Formation of dew- When temperature drops, the water vapour in the air condenses to form dew. This phenomenon is based on condensation.
conclusion: The correct option is a).
