Q. 'CFCs' are used in fire extinguishers and as propellants in:

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Q. Semi conductor silicon Boron, used in providing energy to:

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Q. Energy produced from sun is called:

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Q. In troposhere, convection is process responsible for transfer of:

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Q. What are two stages involved in photosynthesis?

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Q. Greenhouse gases are carbon dioxide, methane and:

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Q. Evaporation' is process of:

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Q. Ecosystem is a distinct system of interdependent plants and animals, along with their:

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Q. Stratospheric ozone is measured by a unit called:

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Q. Currently, proportion of carbondioxide in atmosphere is:

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Q. Sources of nitrous oxide includes:

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Q. Average weather in a particular region is known as:

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Q. UV-B radiation adversely affect immune system, causing:

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Q. What does tropical rainforest provide?

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Q. In 1987, montreal protocol agreement was scaling down of:

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Q. Nitrous oxide are emitted in atmosphere by use of synthetic fertilizers for:

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Q. Tropical 'cyclones' occur in:

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Q. Windmills are located at top of a tower to height about:

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Q. Mostly deforestation has occurred in the:

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Q. Power dissipation index measures destructive power of:

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