हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Write word equation for the following skeletal equation: KNOA3⟶KNOA2+OA2

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प्रश्न

Write word equation for the following skeletal equation:

\[\ce{KNO3 -> KNO2 + O2}\]

रासायनिक समीकरण/संरचनाएँ
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उत्तर

\[\ce{Potassium nitrate -> Potassium nitrite + Oxygen}\]

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अध्याय 5: Language of Chemistry - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 5 Language of Chemistry
Exercise | Q 4.9

संबंधित प्रश्न

Write the balanced chemical equation for the following reaction.

\[\ce{Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water}\]


Write a balanced chemical equation with state symbols for the following reaction:

Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.


When metal X is treated with a dilute acid Y, then a gas Z is evolved which burns readily by making a little explosion.

  1. Name any two metals which can behave like metal X.
  2. Name any two acids which can behave like acid Y.
  3. Name the gas Z.
  4. Is the gas Z lighter than or heavier than air?
  5. Is the reaction between metal X and dilute acid Y exothermic or endothermic?
  6. By taking a specific example of metal X and dilute acid Y, write a balanced chemical equation for the reaction which takes place. Also indicate physical states of all the reactants and products.

Balance the following chemical equation:

\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]


Write symbolic representation for the following word equation and balance them :

Aluminium + Chlorine → Aluminium chloride.


What is a chemical equation? Why it is necessary to balance it?


How is a flame test performed?


In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.

2H2 + O2 → 2H2O


Balance the following simple equation:

Fe2O3  +  H2  → Fe  +  H2O


A student took a small amount of copper oxide in a conical flask and added dilute hydrochloric acid to it with constant stirring. He observed a change in colour of the solution. 

  1. Write the name of the compound formed and its colour.
  2. Write a balanced chemical equation for the reaction involved.

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