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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Differentiate Between Direct Combination Reaction and a Decomposition Reaction. - Chemistry

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प्रश्न

Differentiate between direct combination reaction and a decomposition reaction.

अंतर स्पष्ट करें

उत्तर

Direct combination: “Is a reaction in which two elements or compound combine to give one new compound.”
\[\ce{C + O2->CO2}\]

Decomposition reaction: “A chemical compound (breaks up) decomposes into two or more simpler substances.”
\[\ce{Copper carbonate->Copper oxide + Carbon dioxide}\]
\[\ce{CuCO3->CuO + CO2}\]

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अध्याय 6: Chemical Reactions - Exercises

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संबंधित प्रश्न

What is a decomposition reaction?


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

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Give a balanced equation for the following type of reaction:

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  1. Write a balanced chemical equation of the reaction.
  2. Identify the brown gas X evolved.
  3.  Identify the type of reaction.
  4. What could be the pH range of aqueous solution of the gas X?

  1. Identify the gasses evolved at the anode and cathode in the above experimental set up.
  2. Name the process that occurs. Why is it called so?
  3. Illustrate the reaction of the process with the help of a chemical equation.

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  1. Name the substance ‘X’ and write its formula.
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