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Write answer to the following. How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?

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प्रश्न

How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?

संक्षेप में उत्तर
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उत्तर

\[\ce{\underset{peroxide}{\underset{Hydrogen}{2H2O}_{2(l)}} -> \underset{water}{2H2O} + \underset{oxygen}{O2\uparrow}}\]

  1. The decomposition of hydrogen peroxide (H2O2) into water and oxygen takes place slowly at room temperature.
  2. However, hydrogen peroxide decomposes rapidly in the presence of manganese dioxide (MnO2) powder, which acts as a catalyst.
  3. Thus, by adding manganese dioxide (MnO2) powder, the rate of a chemical reaction can be increased.
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अध्याय 3: Chemical reactions and equations - Exercise [पृष्ठ ४५]

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बालभारती Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
अध्याय 3 Chemical reactions and equations
Exercise | Q 2. b. | पृष्ठ ४५

संबंधित प्रश्न

Write one equation for decomposition reactions where energy is supplied in the form of heat.


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


State an important use of decomposition reactions.


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


What type of reaction is represented by the following equation?

\[\ce{2FeSO4 -> Fe2O3 + SO2 + SO3}\]


What type of chemical reaction takes place when limestone is heated?


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


Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{Zn_{(s)} + H2SO4 -> ZnSO4_{(s)} + H2_{(g)}}\]


Explain the following type of chemical reaction, giving two examples for it:

Decomposition reaction


What are thermal decomposition reactions ? Explain with an example.


What is a redox reaction? Explain with an example.


What does one mean by endothermic reaction? Give example.


Give a scientific reason.

When the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky.


Identify the type of following reaction :


(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.


Answer the following question.
2 g of silver chloride is taken in a china dish and the china dish is placed in sunlight for some time. What will be your observation in this case? Write the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.


Classify the following reaction into – 

  1. Direct combination 
  2. Decomposition
  3. Displacement
  4. Double decomposition

The reaction is – Zinc hydroxide on heating gives zinc oxide and water.


Give a balanced equation for –

A thermal decomposition reaction involving heat on limestone [calcium carbonate]


Give a balanced equation for –

A double decomposition neutralization reaction involving an acid and a base


Give a balanced equation for –

A white precipitate obtained during a double decomposition reaction involving a silver salt with sodium salt.


Complete the statement by filling in the blank with the correct word:

Decomposition of silver salts in the presence of sunlight is an example of _________.


Differentiate between the following:

Thermal decomposition and thermal dissociation.


Explain the reaction given in the figure.


Chemical volcano is an example of ______ type of reaction.


Which among the following statement(s) is (are) true?

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.


Assertion: Decomposition of vegetable matter into compost is an endothermic reaction.

Reason: Decomposition reaction involves breakdown of a single reactant into simpler products.


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:

  1. What type of reaction does calcium carbonate undergoes?
  2. What change in colour is observed in lime?
  3. 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.


Complete the following reaction:

\[\ce{C_12H_22O11->[Heat]}\] ______ + ______.


Write the molecular formula of calcium carbonate.


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