In the disproportionation reaction,
3HClO3 → HClO4 + Cl2 + 2O2 + H2O
the equivalent mass of the oxidising agent is (molar mass of HClO3 = 84.45)
16.89
32.22
84.45
28.15
A compound in which a metal ion Mx+ (Z = 25) has a spin only magnetic moment of BM. The number of unpaired electrons in the compound and the oxidation state of the metal ion are respectively
4 and 2
5 and 3
3 and 2
4 and 3
To an aqueous solution containing anions a few drops of acidified KMnO4 are added. Which one of the following anions, if present will not decolourise the KMnO4 solution ?
I-
CO
S2-
NO
In the following reaction,
Mx+ + MnO → MO + Mn2+ + O2
If one mole of MnO oxidises 2.5 moles of Mx+, then the value of x is
5
3
2
1
MnO-4 ions are reduced in acidic condition to Mn2+ ions whereas they are reduced in neutral condition to MnO2. The oxidation of 25 mL of a solution X containing Fe2+ ions required in acidic condition 20 mL of a solution Y containing MnO-4 ions. What volume of solution Y would be required to oxidise 25 mL of a solution X containing Fe2+ ions in neutral condition?
11.4 mL
12.0 mL
33.3 mL
35.0 mL
Which one of the following reactions involves disproportionation?
2H2SO4 + Cu → CuSO4 + 2H2O + SO2
As2O3 + 3H2S → As2S3 + 3H2O
2KOH + Cl2 → KCl KOCl + H2O
4NH3 + 3O2 → 2N2 + 6H2O
aK2Cr2O7 + bHCl + cH2SO4 → xCrO2Cl2 + yKHSO4 + zH2O.
The above equation balances when:
a = 2; b = 4; c = 6 and x = 2; y = 6; z = 3
a = 4; b = 2; c = 6 and x = 6; y = 2; z = 3
a = 6; b = 4; c = 2 and x = 6; y = 3; z = 2
a = 1; b = 4; c = 6 and x = 2; y = 6; z = 3
In one of the following reactions HNO3 does not behave as an oxidizing agent. Identify it :
2HNO3 + P2O5 → 2HPO3 + N2O5
I2 + 10 HNO3 → 2HIO3 + 10 NO2 + 4H2O
3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
NO3 + 3Fe2+ + 4H+ → NO + 3Fe3+ + 2H2O
A.
2HNO3 + P2O5 → 2HPO3 + N2O5
In the reaction,
2HNO3 + P2O5 → 2HPO3 + N2O5
HNO3 does not behave as an oxidising agent because in this reaction, P2O5 shows dehydrating properties. It removes water molecule from HNO3.
In which of the following reactions, H2O2 acts as a reducing reagent?
PbO2(s) + H2O(aq) → PbO(s) + H2O(l) + O2(g)
Na2SO3(aq) + H2O2(aq) → Na2SO4(aq) + H2O(l)
2KI(aq) + H2O2(aq) → 2KOH(aq) + I2(s)
KNO2(aq) + H2O2(aq) → KNO3(aq) + H2O(l)
In organic reactions, sodium in liquid ammonia is used as
reducing agent
hydrating agent
oxidising agent
precipitating agent