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प्रश्न
State an important use of decomposition reactions.
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उत्तर
- Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions.
- An important use of decomposition reaction is the digestion of food in our bodies.
- This is because the carbohydrates and proteins in the food we eat break down into simpler sugars like glucose and amino acids, respectively.
- These further break down to provide us with energy to do work.
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संबंधित प्रश्न
What type of reaction is represented by the following equation?
NH4 CI → NH3 + HCI
What type of chemical reaction take place when lime-stone is heated?
What type of chemical reaction take place when silver bromide is exposed to sunlight?
What type of chemical reaction take place when electricity is passed through water?
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{Zn_{(s)} + H2SO4 -> ZnSO4_{(s)} + H2_{(g)}}\]
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Thermal decomposition of a substance is brought about with the help of
- reactants
- water
- wind
- heat
What does one mean by endothermic reaction? Give example.
Give a balanced equation for –
A thermal decomposition reaction involving heat on limestone [calcium carbonate]
Differentiate between the following:
Electrolytic decomposition and photochemical decomposition.
What is electrolysis?
Explain the reaction given in the figure.
Electrolysis is type of ______ reaction.
Balance the following chemical equation and identify the type of chemical reaction.
`"HgO"("s") overset("(heat)")(->) "Hg"("l") + "O"_2("g")`
Balance the following chemical equation and identify the type of chemical reaction.
`"H"_2"O"_2("l") overset("U V")(->) "H"_2"O"("l") + "O"_2("g")`
The reaction of calcium carbonate, with freshly prepared lime water, is shown below:
Answer the questions with the help of a diagram:
- What type of reaction does calcium carbonate undergoes?
- What change in colour is observed in lime?
- Write the chemical equation.
These consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: Silver bromide decomposition is used in black and white photography.
Reason: Light provides energy for this exothermic reaction.
What is observed when silver chloride is exposed to sunlight? Give the type of reaction involved.
