Advertisements
Advertisements
प्रश्न
A dilute ferrous sulphate solution is gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
पर्याय
KMnO4 is an oxidising agent and it oxidises FeSO4
FeSO4 acts as an oxidising agent and it oxidises KMnO4
The colour disappears due to dilution; no reaction is involved
KMnO4 is an unstable compound and decomposes in presence of FeSO4 to a colourless compound.
Advertisements
उत्तर
KMnO4 is an oxidising agent and it oxidises FeSO4
Explanation -
Potassium permanganate (KMnO4) is an oxidising agent. It oxidises ferrous sulphate to ferric sulphate in the presence of dilute
H2SO4.
`underset("Purple")(2"KMnO"_4) + 8"H"_2"SO"_4 + 10"FeSO"_4 -> "K"_2"SO"_4 + 2"MnSO"_4 + 8"H"_2"O" + 5"Fe"_2("SO"_4)_3`
By taking part in the reaction, the light purple colour of the solution slowly fades and finally disappears.
APPEARS IN
संबंधित प्रश्न
Balance the following chemical equation.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Translate the following statement into chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
How will you indicate Endothermic reaction in a chemical equation?
Translate the following statement into chemical equation and then balance the equation:
Phosphorus burns in oxygen to give phosphorus pentoxide.
Balance the given equation:
Mg(OH)2 + HCI MgCI + H2O
Balance the following equation and add state symbols:
Zn + HCI → ZnCI2 + H2
Give one example of an endothermic reaction.
An acid which can decolourise purple coloured potassium permanganate solution is:
(a) sulphuric acid
(b) citric acid
(c) carbonic acid
(d) hydrochloric acid
Balance the following equation. Also name the product formed.
K2O + H2O → KOH
While performing the experiment with raisins to determine the percentage of water absorbed by them, a student made following measurements:
Mass of water in the beaker = 40 g
Mass of raisins before soaking = 5 g
Mass of raisins after soaking for 2 hours = 8 g
Mass of water left in the beaker after the experiment = 35 g
The percentage of water absorbed by raisins is:
Balance the following equation:
KOH + Cl2 → KCl + KClO + H2O
1 g of copper powder was taken in a China dish and heated. What change takes place on heating? When hydrogen gas is passed over this heated substance, a visible change is seen in it. Give the chemical equations of reactions, the name and the color of the products formed in each case.
Write word equation for the following molecular equation:
\[\ce{N2 + 3H2 ⇌[Fe - 450°C][200 atoms] 2NH3 + \triangle}\]
Word equation:
State why [+ Δ] indication is seen after NH3.
State what 200 atmospheres – indicates.
State the function of Fe in the above reaction.
Give word equation for the following chemical reaction and give the names of the product formed.
\[\ce{CuO + H2SO4 -> CuSO4 + H2O}\]
Give reason for the following:
Silver salts are kept in dark coloured bottles.
Write word equation for the following chemical reaction given below. Also state the observation seen in the case.
Pb(NO3)2 + 2NH4OH → 2NH4N03 + Pb(OH)2↓
Write word equation for the following chemical reaction given below. Also state the observation seen in the case.
\[\ce{2SO2 + O2 ⇌[V2O5][450°C] 2SO3}\]
Balance the following simple equation:
\[\ce{N2 + H2 <=> NH3}\]
Write a balanced equation for the following word equation:
Potassium bicarbonate → Potassium carbonate + Water + Carbon dioxide
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
C2H5OH + 3O2 → 2CO2 + 2H2O
