Advertisements
Advertisements
Question
Which of the following statements about the given reaction are correct?
`3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`
- Iron metal is getting oxidised
- Water is getting reduced
- Water is acting as reducing agent
- Water is acting as oxidising agent
Options
(i), (ii) and (iii)
(iii) and (iv)
(i), (ii) and (iv)
(ii) and (iv)
Advertisements
Solution
(i), (ii) and (iv)
Explanation -
In the following reaction, `3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`
As the addition of oxygen is called oxidation and removal of oxygen is known as reduction so, Fe is getting oxidised to Fe3O4 , at the same time H2O is getting reduced to H2.
In a redox reaction, the reactant causing the oxidation of other reactant is called as an oxidising agent since H2O is causing the oxidation of Fe, therefore H2O is the oxidising agent.
Hence, the correct answer is option 3.
APPEARS IN
RELATED QUESTIONS
Write the balanced chemical equation for the following reaction.
\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]
Translate the following statement into chemical equation and then balance the equation:
Aluminium metal replaces iron from ferric oxide, Fe2O3, giving aluminium oxide and iron.
What is a chemical equation? Explain with the help of an example.
Balance the given chemical equation:
NH3 → N2 + H2
Which of the following does not involve a chemical reaction?
Name the various types of chemical reactions.
Write balanced chemical equation with state symbols for the following reaction:
Barium chloride solution reacts with sodium sulphate solution to give insoluble barium sulphate and a solution of sodium chloride.
Write symbolic representation for the following word equation and balance them :
Calcium carbonate → Calcium oxide + Carbon dioxide.
Complete the following equation:
CH4 + O2 —>
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Write the chemical equation for the following word equation and balance them.
Calcium oxide + Carbon dioxide → Calcium carbonate
Write the balanced chemical equation of the following reaction.
potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
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
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
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.
Give reason for the following:
Silver salts are kept in dark coloured bottles.
Give an example of a chemical equation in which two reactants form:
three product
Balance the following simple equation:
K + H2O → KOH + H2
Balance the following simple equation:
Al + H2O → Al2O3 + H2
Write a balanced equation for the following word equation:
Nitrogen dioxide + Water + Oxygen → Nitric acid
