Advertisements
Advertisements
प्रश्न
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
विकल्प
(i), (ii) and (iii)
(iii) and (iv)
(i), (ii) and (iv)
(ii) and (iv)
Advertisements
उत्तर
(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
संबंधित प्रश्न
How will you indicate Exothermic reaction in a chemical equation?
Balance the gievn equation:
NaOH + H2SO4 
Na2SO4 + H2O
With the help of an appropriate example, justify that some of the chemical reactions are determined by Evolution of a gas.
Give chemical equation for the reaction involved in the above case.
A metal X forms a salt XSO4. The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wire and alloys like brass.
(a) What do you think metal X could be?
(b) Write the name, formula and colour of salt XSO4.
(c) What is the blue precipitate Y?
(d) Write a chemical equation of the reaction which takes place when salt XSO4 reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.
The removal of oxygen from a substance is called:
(a) oxidation
(b) corrosion
(c) reduction
(d) rancidity
Name the type of chemical reaction shown by the following equation:
2Mg+ O2 → 2MgO
Why do we need to balance chemical equations?
Balance the following equation. Also name the product formed.
`"NaNO"_3 → "NaNO"_2 + "O"_2` Name of product (s)
Balance the following equation Also name the product formed.
`"K" + "CI"_2 → "KCI"`
Balance the following equation. Also name the product formed.
`"Zn" + "HCI" → "ZnCI" _2 + "H"_2`
Balance the following equation. Also name the product formed.
FeCI2 + CI2 → FeCI3
Complete the following equation:
CH2 + H5OH `("Hot Conc." H_2SO_4)/`>
Balance the following equation:
Pb3O4 + HCl → PbCl2 + H2O + Cl2
Write the balanced chemical equation of the following reaction.
silver nitrate → silver + nitrogen dioxide + oxygen
Answer the following question.
What is observed when 2 mL of dilute hydrochloric acid is added to 1 g of sodium carbonate taken in a clean and dry test tube? Write a chemical equation for the reaction involved.
Write word equation for the following molecular equation:
\[\ce{CaCO3 + 2HCl ->[\triangle] CaCl2 + H2O + CO2 [g]}\]
Word equation:
State which characteristic does [g] in the above reaction indicate. The word equation of:
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
What is the indications of the arrow between the reactants and the products and of the arrow pointing downwards at the end.
Balance the following simple equation:
FeCl2 + Cl2 → FeCl3
Balance the following simple equation:
K + CO2 → K2O + C
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Cl2 + 2H2O + SO2 → 4HCl + H2SO4
