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प्रश्न
State any two measures to minimize the impact of global warming.
उत्तर
(i) The two measures to minimize the effect of global warming are:
- Use of renewable sources of energy in place of electricity from the power generating station.
- Use of bio-char stoves for cooking.
- Reforestation and sustainable use of land.
- Controlling population through family planning, welfare reform and the empowerment of women. (ANY 2)
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संबंधित प्रश्न
During transformation of liquid phase to solid phase, the latent heat is ______.
Liquid ammonia is used in ice factory for making ice from water. If water at 20°C is to be converted into 2 kg ice at 0°C, how many grams of ammonia are to be evaporated? (Given: The latent heat of vaporization of ammonia = 341 cal/g)
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)
Explain the following temperature vs time graph.
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The specific latent heat of vaporisation of steam is 2260 J/g. Comment on this.
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How fog is formed?
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| Column A | Column B |
| 1) Absolute humidity | a) J or cal |
| 2) Latent heat | b) J/kg °C |
| 3) Specific heat capacity | c) kJ/kg |
| 4) Heat | d) no unit |
| e) kg/m3 |
Write the name.
Products obtained when sugar is heated.
During reheating, ice is converted to water at a temperature of 0 °C.
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.
Specific latent heat L = ______.
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?
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