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Hydrogen — CHEMISTRY STD 8 — Question

ICSE BoardEnglish MediumSTD 8CHEMISTRYHydrogen2 Marks
Question
State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.
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Answer

In free state : In traces in the earth’s crust and atmosphere and in volcanic gases. It is also found in huge amount in the interior of the sun.
In combined state : In organic compounds, plant and animals, in acids, in water.

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