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प्रश्न
Why is respiration considered an exothermic reaction? Explain.
Explain why respiration is considered as an exothermic reaction. Give the chemical equation for this reaction.
उत्तर १
Respiration is considered as an exothermic reaction because, in respiration, the oxidation of glucose takes place, which produces large amount of heat energy.
\[\ce{C6H12O6(aq) + 6O2(g) -> 6CO2(g) + 6H2O(l) + energy}\]
उत्तर २
We get this energy from the food we eat. During digestion, food is broken down into simpler substances. For example, rice, potatoes and bread contain carbohydrates. These carbohydrates are broken down to form glucose. This glucose combines with oxygen in the cells of our body and provides energy. The special name of this reaction is respiration. Thus, respiration is an exothermic process because energy is produced during this process.
\[\ce{C6H12O6(aq) + 6O2(aq) -> 6CO2(aq) + 6H2O(l) + energy}\]
संबंधित प्रश्न
What happens chemically when quicklime is added to water filled in a bucket?
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(a) What is gas A?
(b) What is the common name of B?
(c) What do you think could be C?
(d) What is material D? Where is it found?
(e) Name the organic compound E.
(f) What is gas F? Name the natural process during which it is released.
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2K + Cl → 2KCl
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4M + 3O2 → 2M2O3
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(a) combination reaction as well as reduction reaction
(b) decomposition reaction as well as oxidation reaction
(c) oxidation reaction as well as displacement reaction
(d) combination reaction as well as oxidation reaction
What happens during a chemical reaction ?
Fill in the blank
The chemical reaction between hydrogen and chlorine is a ................ reaction
A student prepared an aqueous solution of CuSO4 in beaker X and an aqueous solution of FeSO4 in beaker Y. He then dropped some iron pieces in beaker X and some zinc pieces in beaker Y. After about 10 hours he observed that the solutions in X and Y respectively appear:
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(B) colourless and pale green
(C) colourless and light blue
(D) greenish and colourless
(a) What is double displacement reaction? Explain with an example.
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(i) Name and define the type of reaction that has taken place.
(ii) Write balanced chemical equation for the above reaction and the chemical name of the product formed.
(iii) List two main observations of this reaction.
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Give a balanced equation for –
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(iii) Evaporation of water
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