Advertisements
Advertisements
प्रश्न
Balance the given equation:
Fe + O2
Fe2O3
Advertisements
उत्तर
4Fe + 3O2 → 2Fe2O3
APPEARS IN
संबंधित प्रश्न
Translate the following statement into chemical equation and then balance it.
Hydrogen gas combines with nitrogen to form ammonia
Write the balanced chemical equation for the following reaction.
\[\ce{Zinc + Silver nitrate -> Zinc nitrate + Silver}\]
What does the symbol (aq) represent in a chemical equation?
Giving examples, state the difference between balanced and unbalanced chemical equations.
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.
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
When a mixture of gases X and Y is compressed to 300 atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide (heated to a temperature of 300°C), then an organic compounds Z having the molecular formula CH4O is formed. X is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; Y is a gas which can be made by the action of a dilute acid on an active metal; and Z is a liquid organic compound which can react with sodium metal to produce hydrogen gas.
(a) What are X, Y and Z?
(b) Write a balanced chemical equation of the reaction which takes place when X and Y combine to form Z. Indicate the conditions under which the reaction occurs.
Explain the following reaction with one suitable example .
Decomposition reaction
Balance the following equation. Also name the product formed.
`"NaNO"_3 → "NaNO"_2 + "O"_2` Name of product (s)
What do the following symbol stand for?
2H2
What is the limitation of the reaction given in question 2?
Balance the following equation:
NO2 +H2O → HNO2 + HNO3
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the volume of chlorine gas formed at S.T.P.
Choose the correct alternative and rewrite the following sentence.
Which of the following is not required to find the pH of a given solution?
Define: Endothermic reaction
Write word equation for the following molecular equation:
\[\ce{NH3 [g] + HCl [g] ⇌ NH4Cl [s]}\]
Word equation:
State which characteristic is observed in the above reaction.
Give an-example of a similar above characteristic, seen between two other gaseous reactants.
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Copper [II] sulphate to sodium hydroxide.
Give word equation for the following chemical reaction and give the names of the product formed.
Zn + 2HC1→ ZnCl2 + H2
Balance the following simple equation:
Al + H2O → Al2O3 + H2
Balance the following simple equation:
\[\ce{N2 + H2 <=> NH3}\]
