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How is hydrogen prepared: 

(a) From water by using a reducing agent? 

(b) In laboratory in the pure form? 

(c) From hydrocarbon? 

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1 Answer

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a) It is usually prepared by the reaction of granulated zinc with dilute hydrochloric acid. 

2Na + 2H2O ⟶ 2NaOH + H

b) By the electrolysis of water. 

c) CH4 + H2O(g) ⟶ Co(g) + 3H2(g)

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