English

Balance the Given Equation: Fe + O2 Fe2o3 - Science

Advertisements
Advertisements

Question

Balance the given equation:

Fe + O2  Fe2O3

 

Advertisements

Solution

 4Fe + 3O2 → 2Fe2O3

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Chemical Reactions and Equations - Exercise 1 [Page 19]

APPEARS IN

Lakhmir Singh Chemistry (Science) [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercise 1 | Q 15.04 | Page 19

RELATED QUESTIONS

How will you indicate Exothermic reaction in a chemical equation?


Complete and balance the following equation:

NaOH  + ............     Na2 SO4    + H2O

 


Fill in the following blank with suitable word:

A solution made in water is known as an ........... solution and indicated by the symbol ...........

 


Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.


Write the balanced equation for the following reaction, and add the state symbols:

Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water.


A colourless lead salt, when heated, produces a yellow residue and brown fumes.
(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.


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

Fe + CuSO4 → FeSO4 +Cu


Write the balanced equation for the following chemical reaction.

\[\ce{Barium chloride + Aluminium sulphate -> Barium sulphate + Aluminium chloride}\]


Write word equation for the following skeletal equation:

\[\ce{AgBr -> Ag + Br2}\]


Balance the following equation. Also name the product formed. 

CO2 + C →  CO


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


Write the balanced chemical equation of the following reaction.
potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water


Write the balanced chemical equation of the following reaction.

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


When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.

Write the balanced chemical equation for this reaction.


Write word equation for the following molecular equation:

CaO + H20 → Ca (OH)2 + Δ

Word equation:

State why [+ Δ ] is not written in the reaction, if ZnO reacts with H2O.


A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – zinc carbonate.


Name the following:

The gas evolved when a dilute acid is added to chalk [limestone].


Balance the following simple equation:

Al  +   H2SO4  →   Al2(SO4)3   +   H2 


Balance the following simple equation:

NaOH  +  Cl2  →  NaCl  +   NaClO  +  H2


Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Fe2O3 + 2H2 → 2Fe + 3H2O


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×