Write some use of hydrogen....

Write some use of hydrogen.

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MATTER (CHEMICAL EFFECTS OF ELECTRICITY)
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JNAN PUBLICATION-KNOW ABOUT SOME COMMON GASES (OXYGEN AND HYDROGEN)-EXAMPLE

What is the specific gravity of oxygen?
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What is the chemical symbol of oxygen?
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Is oxgen flamable?
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When the oxygen level in air considered to be dangerous?
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What element in the air is essential for life?
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Write towe advantages of having oxygen in air.
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What happens when Oxygen reacts with non-metals?
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Why oxygen is called acid producer?
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Mention some metals which absorb oxygen.
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What are the materials required for preparation of oxygen gas from hyd...
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What are the materials required for preparation of oxygen gas from pot...
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What are the materials requried for laboratory preparation of hydrogen...
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What are the advantages of having oxygen in air?
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What vital role oxygen play during respiration of living beings?
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Write down some absorber of oxygen.
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Write some uses of oxygen.
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Write the way of preparation of oxygen in laboratory with the question...
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Write some use of hydrogen.
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Write some physical properites of oxygen.
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Write two physical properties and two chemical properties of Hydrogen.
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