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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Complete and Balance the Following Chemical Equations: Pb (No_3)_2 - Chemistry

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प्रश्न

Complete and balance the following chemical equations:

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

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एका वाक्यात उत्तर

उत्तर

\[\ce{Pb(NO3)2->[heat]PbO + 4No 2+ O2↑}\] 

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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 pipes coated with zinc do not get rusted easily.


Complete and balance the following chemical equations:

Fe `"SO"_4`  + NaOH  `→`

   (aq.)          (aq.)


Give reason .

A person suffering from acidity is advised to take an antacid.


FILL IN THE BLANK

........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.


TRUE \ FALSE

Evaporation of water is a physical change. True or false ?


Write a short note on the information derived from a balanced chemical equation.


What do you observe when :

an iron nail is kept in tap water for few days


Write true or false :

When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .


Explain by writing a word equation.

Bubbles are seen on adding lemon juice to baking soda.


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Sodium chloride


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Potassium fluoride


Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition) 

Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.


What do you observe when HCI is passed through a silver nitrate solution.


Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.


Select the correct answer for the following options:

The gas which reacts with oxygen to give a neutral liquid.


Give reason for the following:

Electrolytic decomposition of water is a reaction involving change of state.


Name the following:

The type of change physical or chemical involved – ‘during respiration in human beings’.


Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.


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

Copper nitrate.


Circle the odd one out. Give reason for your choice


Mention the various conditions required for a chemical reaction to occur.


Burning of paper is the best example of ______ change.


A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

Are these changes chemical in nature?


The chemical name of baking soda is sodium bicarbonate.


Match the following:

  Column I   Column II
1. Burning of coal a. Rusting
2. Painting of a surface b. Evaporation
3. Dipping iron in the water c. Chemical change
4. Salt from seawater d. Prevention of rusting

Write the chemical reaction of baking soda with lemon.


How would you show that the settling of curd is a chemical change?


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