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प्रश्न
Explain the meaning of greenhouse effect.
उत्तर
The phenomenon of the trapping of infrared radiations of long wave length being radiated to space by greenhouse gases like carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) to keep the environment warm at the planet’s surface and the lower atmosphere is called greenhouse effect.
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संबंधित प्रश्न
What is the Greenhouse effect?
- Which requires more heat: 1 g ice at 0℃ or 1 g water at 0℃ to raise its temperature to 10℃?
- Explain your answer in part (a).
Explain the following:
The heat supplied to a substance during it change of state, does not cause any rise in its temperature.
A refrigerator converts 100g of water at 20℃ to ice at – 10℃ in 73.5 min. Calculate the average rate of heat extraction in watt. The specific heat capacity of water is 4.2 J kg-1 K-1, specific latent heat of ice is 336 J g-1 and the specific heat capacity of ice is 2.1 J kg-1 K-1.
Explain the following temperature vs time graph.
A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained? (Given : latent heat of melting of ice = 80 cal/g, latent heat of vaporization of water = 540 cal/g, specific heat of water = 1 cal/g °C)
When a liquid is getting converted into solid, the latent heat is ………………………………
Define the following terms:
(i) Latent heat,
(ii) Latent heat of fusion of ice.
Give one consequence of the high specific latent heat of fusion of ice.
Why water get cooled in a ‘Surahi’ in hot season?
What observation you will record and how will you determine the specific latent heat of fusion of ice?
Find the odd one out and give its explanation.
Write the name.
Products obtained when sugar is heated.
Write scientific reason.
Even if boiling water is constantly heated, its temperature does not rise.
Write scientific reason.
Use a pressure cooker to cook food in cold air.
For the same mass of ice and ice-cold water, why does ice produce more cooling than ice-cold water?
Observe the following graph and answer the following questions:
- What does the graph represent?
- What does the line AB represent?
- What does the line BC represent?
