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CBSE Class 10 Answered

In electrolysis of water  why is yhe volum of gas collected over one electrod double that of gas collect ed over the other electrode?
Asked by dhruvgosai701 | 02 May, 2019, 04:43: PM
answered-by-expert Expert Answer
During electrolysis of water, there are more bubbles coming out of the hydrogen tube than oxygen tube though the number of atoms and valency of oxygen is more than hydrogen, because,
  • The ratio of hydrogen and oxygen atoms in water molecule is 2:1.
  • That means, on breaking of one water molecule by electrolysis, two atoms of hydrogen atoms and one atom of oxygen are released.
  • Thus , hydrogen atoms released are twice the number of oxygen atoms on electrolysis.
  • Hence, more bubbles of hydrogen atoms comes out than oxygen atoms in electrolysis.
Answered by Ramandeep | 02 May, 2019, 05:20: PM

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