When water is electrolysed, gas collected at cathode is ___.

Oxygen

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Deuterium

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Ozone

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Hydrogen

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Solution

The correct option is D Hydrogen
$A t c a t h o d e : H y d r o g e n i s p r o d u c e d$
$2 H^{+} (a q) + 2 e^{-} \to H_{2}$
$A t a n o d e : O x y g e n i s p r o d u c e d$
$4 O H^{-} (a q) \to 2 H_{2} O + O_{2} + 4 e^{-}$

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Similar questions

When water is electrolyzed, which gas is collected at the cathode?

Name the gas that evolved at cathode and anode when water is electrolysed. State their ratio by volume.

H_{2} S O_{4}

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