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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Write Symbolic Representation for the Following Word Equation and Balance Them : Calcium Carbonate → Calcium Oxide + Carbon Dioxide. - Chemistry

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प्रश्न

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

Calcium carbonate → Calcium oxide + Carbon dioxide.

एक पंक्ति में उत्तर
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उत्तर

Calcium carbonate → Calcium oxide + Carbon dioxide

`"CaCO"_3 → "CaO" + "CO"_2 `

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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 8.1

संबंधित प्रश्न

2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.


Balance the given equation:

Fe + O2  Fe2O3

 


Balance the following equation and add state symbols:

Zn  +  HCI →  ZnCI2  +  H2

 


Balance the following equation. Also name the product formed. 

`"CO" + "O"_2  → " CO"_2`


Complete the following equation:
CH4 + O2 —>


Write the balanced chemical equation of the following reaction.

iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide


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.

NH3 + HCl ⇌ NH4Cl 


Representation of the results of a chemical change – is a chemical equation.

For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓

Answer the following:

Is the equation given above a balanced equation. Give reasons.


Write word equation for the following chemical reaction given below. Also state the observation seen in the case.

\[\ce{Na2SO3 + 2HCl ->[\triangle] 2NaCl + H2O + SO2}\]


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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