Redox Reactions questions
1186 published questions with worked solutions.
- The tailing of mercury on exposure to air shows a change in oxidation number of ____ unit(s).
- The ratio of oxygen atoms having -2 and -1 oxidation numbers in S_2O_8^ 2- is ____.
- The total number of electrons involved in the redox change, 3Fe+4H_2O Fe_3O_4+4H_2, is ____.
- The stoichiometric coefficient n in the reaction, nH_2C_2O_4+2KMnO_4 nCO_2+K_2O+MnO+H_2O, is ____.
- Five moles of ferric oxalate are oxidised by how much mole of KMnO_4 in acid medium?
- 0.31 g of an alloy of Fe + Cu was dissolved in excess dilute H_2SO_4 and the solution was made up to 100 mL. 20 mL of this...
- A 5.6 g sample of limestone is dissolved in acid and the calcium is precipitated as calcium oxalate. The precipitate is filtered,...
- 10 mL of 0.2 M solution of K_xH(C_2O_4)_y requires 8 mL of 0.2 M acidified KMnO_4 solution. The value of x is ____.
- Equivalent weight of O_3 in the reaction, 2O_3 3O_2, is ____ (in terms of the active oxygen atom released, O=16).
- 2 M solution of HNO_3 is reduced to NO by a suitable reductant. The normality of HNO_3 used like this is ____.
- 'n' factor for H_2S during its oxidation to SO_2 is ____.
- 80 mL of M 24 K_2Cr_2O_7 solution oxidises 22.4 mL of H_2O_2 solution. The volume strength of H_2O_2 is ____.
- 30 mL of 0.3 M MnSO_4 is completely oxidised by 3 mL of KMnO_4 of unknown normality, each forming the Mn^ 4+ oxidation state. The...
- 'n' factor for SO_2 in, FeS_2+O_2 Fe_2O_3+SO_2, is ____.
- 'n' factor for Cu_2S in the reaction, Cu_2S+KMnO_4 Cu^ 2+ +SO_2+Mn^ 2+ , is ____.
- In how many of the following compounds does nitrogen have an oxidation state of - 13? NH_3, N_3^-, AlN, CN^-, NaN_3, Ca_3N_2
- In carbon suboxide C_3O_2 (O=C=C=C=O), what is the oxidation state of the carbon atom which is in the centre?
- In S_4O_6^ 2- ion, sulphur is in two different oxidation states. What is the sum of these two different oxidation numbers?
- What is the oxidation state of sulphur in Marshall's acid (H_2S_2O_8)?
- What is the oxidation state of Cr in the CrO_8^ 3- ion?
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