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प्रश्न
Differentiate between the following:
Electrolytic decomposition and photochemical decomposition.
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उत्तर
- Electrolytic decomposition: “A decomposition reaction which is brought about by the passage of electric current.”
\[\ce{2H2O->[Electricity][Current]2H2 + O2}\] - Photochemical decomposition: “A decomposition reaction which takes place in presence of light.”
e.g. decomposition of silver salts in the presence of sunlight.
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संबंधित प्रश्न
Write the balanced chemical equation for the following and identify the type of reaction.
\[\ce{Zinc carbonate(s) -> Zinc oxide(s) + Carbon dioxide(g)}\]
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What is electrolysis?
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Exposure of silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride.
(ii) sublimation of silver chloride.
(iii) decomposition of chlorine gas from silver chloride.
(iv) oxidation of silver chloride.
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On heating blue coloured powder of copper (II) nitrate, in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed
- Write a balanced chemical equation of the reaction.
- Identify the brown gas X evolved.
- Identify the type of reaction.
- What could be the pH range of aqueous solution of the gas X?
Write one equation for the decomposition reaction where energy is supplied in the form of electricity.
