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Reductions Involving Aldehydes or Ketones

Hydrogen gas ...

Question

Hydrogen gas is colourless and odourless. It has no effect on moist litmus paper. It burns with a characteristic pop sound when a flame is introduced. Is Hydreogen is neutral?

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Solution

Yes, hydrogen when liberated is in the form of H₂ molecule and hence is neutral.
Acidic properties are exhibited only when H atom is ionised to H⁺ ion.

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