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Give an example of a reaction where the following are involved Light - Chemistry

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Give an example of a reaction where the following are involved

Light

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\[\ce{6CO2 + 6H2O -> C6H12O6 + 6O2}\]

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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 3.2 | पृष्ठ २३

संबंधित प्रश्‍न

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


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

catalyst .


Complete and balance the following chemical equations

Na + H2 O →


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

 

Miscible liquids having slightly different boiling points can be separated by the

  1. evaporation
  2. distillation
  3. fractional distillation
  4. sedimentation

TRUE \ FALSE

A precipitation reaction takes place only in a solution.


TRUE \ FALSE

Copper can displace iron from iron sulphate.


TRUE \ FALSE

Ammonia is a good oxidizing agent.


TRUE \ FALSE

Electrolytic refining is a method in which a thin coating of a metal is done over another metal.


Fill in the blank

A new substance is always formed in a _______ change.


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


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

Water


Give a chemical test to distinguish between the following gases. 

SO2 and Cl2 


Write your observation and a balanced equation in the case of the following substances being heated.

Ammonium chloride 


Complete the table given below.

Addition of dil. H2SO4 to FeS  Odour of gas evolved  

Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.


Burning of paper is a ______ change.


Water boiling into water vapour is an example of chemical change.


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

Can you change rust back into iron by some simple method?


Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.


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