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Class 10ScienceChemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert
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At which electrode is the gas with lower volume formed during electrolysis of water?

Answer and explanation

Correct answer: Anode

During electrolysis of water, hydrogen is produced at the cathode and oxygen at the anode. Their volume ratio is hydrogen : oxygen = 2 : 1, so oxygen is the gas formed in the lower volume, at the anode. The cathode produces the larger volume of hydrogen. Exam tip: Remember: H₂ at the cathode and O₂ at the anode during electrolysis of water.

Related tags

Class 10 ScienceElectrolysis Of WaterChemical ReactionsAnodeCathodeGas Volume Ratio
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10 more MCQs
  1. 1What is the process called when one or more substances form new substances with different properties?
  2. 2Which of the following observations can be a common sign that a chemical reaction has occurred?
  3. 3What are the substances written on the left side of the arrow in a chemical equation called?
  4. 4What are the substances written on the right side of the arrow in a chemical equation called?
  5. 5Balancing a chemical equation is based on which law?
  6. 6What must be the same on the reactant and product sides of a balanced chemical equation?
  7. 7When two or more reactants combine to form a single product, what type of reaction is it?
  8. 8Calcium oxide reacts with water to form calcium hydroxide. What type of reaction is this?
  9. 9When a compound breaks down into two or more simpler substances, what type of reaction is it?
  10. 10When calcium carbonate is heated, it forms calcium oxide and carbon dioxide. What type of reaction is this?
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