Mn+3 ion is unstable in solution and undergoes disproportionation to give Mn+2, MnO2 and H+ ion . Write a balanced ionic equation for the reaction.
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The following reaction takes place when aluminium powder is heated with MnO2.
(a) No, because oxygen is added to aluminium, therefore, it is getting oxidised. (b) No, since manganese has lost oxygen, therefore, it is getting reduced.
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i. 2PbO + C → 2Pb + CO2 ii. MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 What is redox reaction?
The reaction in which one reactant gets oxidised and the other reactant gets reduced is called redox reaction. i. Infirst reaction, lead oxide gets reduced and carbon gets oxidised. ii. Insecond reaction,...
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Which of the following is used in the preparation of chlorine? (a) Only MnO2
(d) MnO2 or KMnO4 with conc HCl give Cl2 .
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Igniting MnO2 in air converts it quantitatively to Mn2O4
Solution: 3 MnO2 → Mn3O4 3 (54.9 + 32) (3 * 54.9 + 64) = 260.7 g = 228.7 g Let the amount of pyrolusite ignited = 100.00 g ∴ Wt. of MnO2 = 80...
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MnO4 2- undergoes disproportionation reaction but MnO4 - does not. Explain.
MnO4 - possessMn in highest oxidation state (+7) But in MnO4 2- ,Mn shows +6 oxidation state Hence MnO4 2- undergoes disproportionation reaction but MnO4 - does not.
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Tell what would happen if phosphorous undergoes disproportionation in basic medium?
P4(s) + 3OH– (aq) ----------> 3H2O(l) PH3(g) + 3H2PO2 - .
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MnO42– undergoes disproportionation reaction in acidic medium but MnO4– does not. Give reason.
Mn has +7 O.S. which is maximum O.S. so MnO4 - can undergo reduction only while MnO4 2- has +6 O.S. of Mn so it can undergo oxidation as well...
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In the reaction MnO2 + 4HCl → MnCl2 + 2H2O +Cl2 Which of the following species acts as reducing agent?
c) Cl- species acts as reducing agent.
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An oxide which gives H2O2 on treatment with dilute acid is a) PbO2 b)Na2O2 c) MnO2 d)TiO2
b) Na2O2 dilute acid.
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Complete and balance the following chemical equation: (i) CaCO3 + HCl (ii) Al+HCl (iii) MnO2+HCl
(i) CaCO3(s) 2HCl(aq) → CaCl2(s)+H2O(l)+CO2(g) (ii) 2Al(s)+6HCl(aq) → 2AlCl(aq)+3H2(g) (iii) MnO2+4HCl(aq) → MnCl2+2H2O(l)+Cl2(g)
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