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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

With Reference to Each of the Above Indications, State the External Indication Seen During – Addition of Dilute Hydrochloric Acid to Silver Nitrate. - Chemistry

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प्रश्न

A chemical reaction is often accompanied by external indications or characteristics which include – 

  1. Colour change
  2. Effervescence or gas evolved
  3. Evolution or absorption of heat
  4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Addition of dilute hydrochloric acid to silver nitrate.

एका वाक्यात उत्तर

उत्तर

Addition of dil. hydrochloric acid to silver nitrate: A white coloured precipitate of AgCl is seen.

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पाठ 6: Chemical Reactions - Exercises

संबंधित प्रश्‍न

How do the following help in bringing about a chemical change?

heat. 


Complete and balance the following chemical equations

NaCI + `AgNO_3`  `→`


Define precipitation.


What are oxides ? 


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

 Which one of the following alters the rate of the chemical reaction without itself undergoing any change?

  1. temperature and Pressure
  2. concentration of reactants
  3. presence of catalyst
  4. none of these

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


How is a strong electrolyte different from a weak electrolyte?


Fill in the blank:
The substances formed as a result of a chemical reaction are called _______


Balance the following equation :

Fe + H2O → Fe3O4 + H2


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

Potassium fluoride


Explain the term reactant and product giving examples. 


Give reason for the following:

Molybdenum is used in the manufacture of ammonia.


Explain,giving one example of the following chemical changes:

Reversible reaction


Name: Gas with rotten egg smell. 


What is observed in performing the following :

  Hydrogen Oxygen Carbon dioxide Chlorine
Litmus test        
Apply a burning splint to the gas        
Colour of gas colourless colourless colourless greenish-yellow
Odour of gas        

What do you observe when dilute sulphuric acid is added to the following:

Sodium Sulphide


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.


Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.


The water we drink is a combination of hydrogen and oxygen.


Classify the following as physical or chemical properties

Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.


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?


Heat may evolve or be absorbed during a ______ change.


Magnesium + oxygen → magnesium oxide.

2Mg + O2 → 2Mg O


Which is used as a catalyst during the process of hydrogenation of oils?


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


______ is the chemical name of slaked lime.


When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.


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