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Give an Example of a Reaction Where the Following Are Involved Electricity - Chemistry

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प्रश्न

Give an example of a reaction where the following are involved

Electricity

एका वाक्यात उत्तर

उत्तर

\[\ce{2H2O->[Electricity] 2H2 + O2}\]

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पाठ 2: Chemical Changes and Reactions - Exercise 2 (A) [पृष्ठ २३]

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सेलिना Concise Chemistry [English] Class 9 ICSE
पाठ 2 Chemical Changes and Reactions
Exercise 2 (A) | Q 3.3 | पृष्ठ २३

संबंधित प्रश्‍न

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

Formation of manure from leaves is a physical change.


When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer

Which of the following is a reducing agent?

  1. oxygen
  2. chlorine
  3. hydrogen
  4. none of these

Explain the following reaction with one suitable example of Double decomposition reaction.


Name the type of chemical reaction shown by the following equation:

2Mg + O2 → 2MgO


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

The conversion of ferrous sulphate to ferric sulphate is ______ reaction. 


What do you observe? When

Water is added to the quick lime.


State the main characteristics of chemical reactions. Give at least one example in each case.


Name: Two nitrates that do not produce nitrogen dioxide on heating.


Give a word equation for the following reaction.

A compound which on heating shows – colour change from brown to yellow.


Give balanced equation for the following conversion affected by heat alone on the substance:

Copper carbonate to copper oxide


Complete the table given below.

Addition of dil. H2SO4 to zinc  Test for gas evolved  

Differentiate between the following:

Neutralization reaction and a precipitation reaction.


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.


Which of the following are chemical changes?

(i) Decaying of wood

(ii) Burning of wood

(iii) Sawing of wood

(iv) Hammering of a nail into a piece of wood


Magnesium + oxygen → magnesium oxide.

2Mg + O2 → 2Mg O


Write the characteristics of chemical change.


When carbon dioxide is passed through lime water ______.


Both CO2 and H2 gases are ______.


Acid rain is a result of ______.


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