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Global warming may result in

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Oxygen which is vital for life is a product of photosynthesis and comes from

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Which one of the following is a greenhouse gas ?

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Acid rain is caused by the pollution of environment by

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The ‘Green House effect’ is produced due to the presence of excess amount of

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Which gas does not form the part of atmosphere ?

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Which one of the following statement is correct ?
Ozone is found in the earth's atmosphere mostly between

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Which one of the following is not a ‘green house gas’ ?

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Green house effect is accelerated by

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Smoke is formed due to

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The increasing abundance of green house gases in atmosphere has led to the following effect except

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The source of energy that causes the least global warming is

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Which of the following fuels causes minimum environmental pollution?

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Biofertilizers convert nitrogen to ________ .

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The elements in the modern Periodic table are arranged according to their

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Periodic table contains how many periods

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Which one is the lightest element in the periodic table

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Which one of the following is most electronegative?

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Periodic table contains how many groups

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Total number of elements in the Periodic table

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