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प्रश्न
Where does hydrogen occur in a free state?
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उत्तर
In the free state, hydrogen is found in traces in the earth's crust and atmosphere. Volcanic gases contain 0.025%, the earth's crust 0.98%, the earth's atmosphere 0.01% and the atmosphere of the Sun and stars 1.1%.
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संबंधित प्रश्न
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