introduction
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position of hydrogen
dihydrogen-occurance
isotopes of hydrogen
preparation of h₂
properties of h₂-physical properties and chemical properties
uses of h₂
hydrides
hydrides-ionic hydrides
hydrides-covalent hydrides
hydrides-metallic hydrides
water-physical properties
structure of water
structure of ice
chemical properties
hard and soft water
hard and soft water-temporary hardness
hard and soft water-permanent hardness
hydrogen peroxide
hydrogen peroxide-physical properties
hydrogen peroxide-chemical properties
hydrogen peroxide-uses
dihydrogen as fuel
previous year questions
advanced questions