Chemistry questions
29404 published questions with worked solutions.
- Cerric ammonium sulphate and potassium permanganate are used as oxidising agents in acidic medium for oxidation of ferrous...
- During a redox titration involving a solution containing Fe^ 2+ ions against MnO_4^- in the presence of excess of H^+ ions, the...
- 0.2 g of a sample of H_2O_2 required 10 mL of N KMnO_4 in a titration in the presence of H_2SO_4 . Purity of H_2O_2 is:
- Corrosion of iron is:
- In which of the following, the oxidation number of oxygen has been arranged in increasing order?
- A solution of KMnO_4 is reduced to MnO_2 . The normality of solution is 0.6. The molarity is:
- What is the oxidation state of P in Ba(H_2PO_2)_2 ?
- How many electrons are involved in oxidation of KMnO_4 in basic medium?
- Which of the following is a redox reaction?
- In which of the following transformations, oxygen is not the reducing agent?
- Which of the following is not an example of redox reaction?
- The oxidation state of a metal in a compound is represented according to the notation which is known as
- By using Stock notation, the following compounds, FeO, Fe_2O_3 , CuO and MnO_2 can be represented as
- The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following is incorrect...
- Cl_2 + H_2S 2 HCl + S . In this reaction, oxidation state of chlorine changes from
- Which of the following reaction has the underlined substance been reduced?
- Which of the following arrangements represents increasing oxidation number of the central atom?
- In which of the following reaction, oxidation number of Cr has been affected?
- The coefficients of I^- , IO_3^- and H^+ in the balanced redox reaction, I^- + IO_3^- + H^+ I_2 + H_2O ; are respectively
- The value of n in the following equation is Cr_2O_7^ 2- + 14 H^+ + n Fe^ 2+ 2 Cr^ 3+ + n Fe^ 3+ + 7 H_2O