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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Name the Type of Chemical Reaction Shown by the Following Equation: Caco3 → Cao + Co2 - Chemistry

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प्रश्न

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

CaCO3 → CaO + CO2

एक पंक्ति में उत्तर

उत्तर

CaCO3 → CaO + CO => Decomposition reaction

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अध्याय 5: Language of Chemistry - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 5 Language of Chemistry
Additional questions | Q 8.1

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.


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

heat. 


Define; catalyst.


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Compounds, which in their molten state allow an electric current to pass through them are called

  1. electrolytes
  2. non-electrolytes
  3. non-conductors
  4. none of these

FILL IN THE BLANK

In a double decomposition precipitation reaction both the reactants must be ............ soluble.


TRUE \ FALSE

Copper can displace iron from iron sulphate.


What are homogenous reactions ?


Name three reducing agents ?


Differentiate between in Chemical reaction and chemical equation.


State four conditions necessary for a chemical reaction to take place.


Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.


Explain the following reaction with one suitable example of Decomposition reaction


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

Fe2O3 + 2Al → Al2O3 + 2Fe


When electric current is passed through acidulated water ______ of water takes place. 


Give an example of a reaction where the following are involved

Light


Give an example of the following chemical changes.

A reaction involving

     (i) Change of state

     (ii) formation of precipitate


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


Complete and balance the following reaction:

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


Select the correct answer for the following options:

The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.


Name the following:

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


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

Hydrated copper sulphate to sulphur dioxide


Give a suitable example with an equation to show the representation of a chemical reaction.


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

Calcium hydroxide.


Photosynthesis is a chemical reaction that takes place in the presence of ______.


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


Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.


Silver articles turning black: ______:: Boiling of H2O: physical change ______.


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


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


When carbon dioxide is passed through lime water ______.


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