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
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
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)
A.
PbO2(s) + H2O(aq) → PbO(s) + H2O(l) + O2(g)
Among the given options, option a has H2O2 that acts as a reducing reagent.
PbO2 (s) + H2O2 (aq) → PbO (s) + H2O (l) + O2 (g)
In organic reactions, sodium in liquid ammonia is used as
reducing agent
hydrating agent
oxidising agent
precipitating agent
In which of the following reactions, chlorine acts as an oxidising agent?
(i) CH3CH2OH + Cl2 → CH3CHO + HCl
(ii) CH3CHO + Cl2 → CCl3 . CHO + HCl
(iii) CH4 + Cl2 CH3Cl + HCl
The correct answer is-
(i) only
(ii) only
(i) and (iii)
(i), (ii) and (iii)
Which one of the following is an example of disproportionation reaction?
3Cl2 (g) + 6OH- (aq) → ClO (aq) + 5Cl- (aq) + 3H2O (l)
Ag2+ (aq) + Ag (s) → 2Ag+ (aq)
Zn (s) + CuSO4 (aq) → Cu (s) + ZnSO4 (aq)
2KClO3 (s) → 2KCl (s) + 3O2 (g)