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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?

थोडक्यात 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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पाठ 3: Chemical reactions and equations - Exercise [पृष्ठ ४५]

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

संबंधित प्रश्‍न

Write the balanced chemical equation for the following and identify the type of reaction.

\[\ce{Zinc carbonate(s) -> Zinc oxide(s) + Carbon dioxide(g)}\]


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


A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.

  1. What is substance P? Write its common name as well as chemical formula.
  2. What is substance Q?
  3. What is gas R?
  4. What is substance S? What is its clear solution known as?
  5. What is substance T? Name any two natural forms in which substance T occurs in nature.

What type of reaction is represented by the digestion of food in our body?


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 type of chemical reaction is used to extract metals from their naturally occurring compounds like oxides or chlorides?


What type of reaction is represented by the following equation?

\[\ce{CaCO3 -> CaO + CO2}\]


What type of chemical reaction takes place when electricity is passed through water?


What type of reaction is represented by the following equation?

\[\ce{NH4NO2 -> N2 + 2H2O}\]


What is meant by a decomposition reaction?


When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out.

  1. Name the iron salt.
  2. Name the type of reaction that takes place during the heating of iron salt.
  3. Write a chemical equation for the reaction involved.

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

Decomposition reaction


How will you obtain  Nitrogen dioxide from lead nitrate.
Also give balanced equations for the reactions


What is a redox reaction? Explain with an example.


Give a scientific reason.

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


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 different type:

\[\ce{2KClO3(s)->[\Delta] 2KCl(aq) + 3O2(g)}\]


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


Give a balanced equation for the following type of reaction:

A thermal decomposition reaction in which a compound decomposes to give two new compounds.


Electrolysis is type of ______ reaction.


Chemical volcano is an example of ______ type of reaction.


The following reaction is used for the preparation of oxygen gas in the laboratory:

\[\ce{2KClO3_{(s)} ->[Heat] 2KCl + 3O2_{(g)}}\]

Which of the following statement about the reaction is correct?


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.


Which of the following is an endothermic process?


When SO2 gas is passed through a saturated solution of H2S, which of the following reaction occurs?


Balance the following chemical equation and identify the type of chemical reaction.

`"HgO"("s") overset("(heat)")(->) "Hg"("l") + "O"_2("g")`


Complete the following reaction:

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


Write the molecular formula of calcium carbonate.


Write one equation for the decomposition reaction where energy is supplied in the form of light.


A solution of a substance ‘X’ is used for whitewashing.

  1. Name the substance ‘X’ and write its formula.
  2. Write the reaction of the substance ‘X’ named in the above formula with water.

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