Q.

Very pure hydrogen (99.9%) can be made by which of the following processes ?

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a

Mixing natural hydrocarbons of high molecular weight

b

Electrolysis of water

c

Reaction of salt like hydrides with water

d

Reaction of methane with steam

answer is B.

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Detailed Solution

Hydrogen of high purity is obtained by electrolyzing aqueous barium hydroxide in presence of Ni electrodes.2H2O+2e- →  2OH- +  H2 2OH- → H2O + 12 O2 + 2e-
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