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Complete and balance the following chemical equation: Pb⁡(NO⁢3)⁢2 ->[Heat] - Chemistry (Theory)

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प्रश्न

Complete and balance the following chemical equation:

\[\ce{Pb(NO3)2 ->[Heat]}\]

रासायनिक समीकरणे/रचना
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उत्तर

\[\ce{Pb(NO3)2 ->[heat] 2PbO + 4NO2 + O2\uparrow}\] 

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पाठ 6: Chemical Reactions - Exercise 1 [पृष्ठ ७३]

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सेलिना Concise Chemistry [English] Class 8 ICSE
पाठ 6 Chemical Reactions
Exercise 1 | Q 6.7 | पृष्ठ ७३

संबंधित प्रश्‍न

State whether the following statement is true or false. In case a statement is false, write the corrected statement.

Iron and rust are the same substances. 


Complete and balance the following chemical equations:

`"H"_2"S"` + `"CI"_2`  `→`  


What do you observe when iron nail is kept in copper sulphate solution for sometime.


Balance the following equation :

Fe + H2O → Fe3O4 + H2


Write the chemical reaction where the following changes are observed.

Gas is evolved


Multiple choice:

A reaction of a type: AB + CD → AD + CD, involves


What do you observe when Cl2 is passed through potassium iodide (KI) solution.


Distinguish by heating the following in dry test tubs.

Zinc carbonate, Copper carbonate and lead carbonate.


Distinguish by dilute sulphuric acid.

Sodium sulphide and sodium sulphite?


Give examples of exothermic reactions i.e. heat evolved in each of the following:

(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.


Give reason for the following:

Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.


Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Copper nitrate.


True or False. If false, give the correct answer.

Taking a glass of water and freezing it by placing it in the freezer is a chemical change.


Discuss how acid rain occurs due to emission of smoke from vehicles and industries?


Two chemical species X and Y combine together to form a product P which contains both X and Y

\[\ce{X + Y -> P}\]

X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?

(i) P is a compound

(ii) X and Y are compounds

(iii) X and Y are elements

(iv) P has a fixed composition


If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Do you think formation of rust from iron is a chemical change?


Heat may evolve or be absorbed during a ______ change.


Give an example where heat, light, and sound are produced during a chemical change.


What is thermochemical reactions?


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