Very pure H2 (99.9%) can be made by which of the following processes?
Correct answer: C. Electrolysis of water
- A. Reaction of methane with steam
- B. Mixing natural hydrocarbons of high molecular weight
- C. Electrolysis of water
- D. Reaction of ionic hydrides with water
Explanation
The electrolysis of pure water (often containing a small amount of an electrolyte like NaOH or H₂SO₄ to conduct current) produces extremely pure hydrogen gas at the cathode and pure oxygen gas at the anode.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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