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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Differentiate Between the Following: Electrolytic Decomposition and Photochemical Decomposition. - Chemistry

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प्रश्न

Differentiate between the following:

Electrolytic decomposition and photochemical decomposition.

फरक स्पष्ट करा

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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पाठ 6: Chemical Reactions - Objective type questions

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विराफ जे. दलाल New Simplified Middle School Chemistry [English] Class 8
पाठ 6 Chemical Reactions
Objective type questions | Q 4.3

संबंधित प्रश्‍न

Taking into consideration the relationship in the first pair, complete the second pair

2H2 + O2 → 2H2O :Combination Reaction :: 2HgO → 2Hg + O2:_________


Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity


Give one example of a decomposition reaction which is carried out by applying heat.


Give one example of a decomposition reaction which is carried out with electricity.


What is the colour of ferrous sulphate crystals? How does this colour change after heating?


Name the product formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change?


When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out.
(a) Name the iron salt.
(b) Name the type of reaction that takes place during the heating of iron salt.
(c) Write a chemical equation for the reaction involved.


(a) Design an activity to demonstrate the decomposition reaction of lead nitrate.

(b) Draw labelled diagram of the experimental set-up. List two main observations.

(c) Write balanced chemical equation for the reaction stating the physical state of the reactant and the products.


The chemical reaction in which two or more products are formed from a single reactant is called _______ reaction.


Which one of the following processes involves chemical reactions?


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