MCQs: The amount of Nitrogen (N2) present in dry air is
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MCQs: Percentage of carbon dioxide in the air is
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MCQs: Percentage of helium in the air is
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MCQs: The atmosphere consists of
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MCQs: The atmospheric layer closest to the earth's surface is
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MCQs: Ozone gas (O3) has
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MCQs: The reformation of ozone in the stratosphere is powered by
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MCQs: Ozone (O?) comprises of
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MCQs: The thermosphere is situated above
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MCQs: The upset caused in the natural balance of concentration of greenhouse gases is called
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MCQs: The temperature variation in the stratosphere is about
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MCQs: The layer which protects the earth from being hit by meteoroids is
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MCQs: Percentage of argon in the air is
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MCQs: The compound which is responsible for acid rain is
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MCQs: Metal that difficult to oxidize are called
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MCQs: On contact with oxygen, Rubidium forms
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MCQs: The most metallic among the following is
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MCQs: As we move across the period the electronegativity
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MCQs: As we move across the period from left to right, the reactivity of metals with oxygen
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MCQs: The sodium metal is soft due to
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