Chemistry questions
29404 published questions with worked solutions.
- Cr_2O_7^ 2- + 2 I^- + 14 H^+ I_2 + 2 Cr^ 3+ + 7 H_2O Which ions are not in balanced position in above reaction?
- In the following redox reaction, Cr_2O_7^ 2- + Fe^ 2+ Fe^ 3+ + Cr^ 3+ , 1 mole of Cr_2O_7^ 2- oxidises
- The coefficients w, x, y, z in the reaction w Cr_2O_7^ 2- + x Fe^ 2+ y Cr^ 3+ + z Fe^ 3+ + H_2O are respectively w x y z
- For the redox reaction, Zn + NO_3^- Zn^ 2+ + NH_4^+ . In basic medium, coefficients of Zn, NO_3^- and OH^- in the balanced...
- I^- reduces IO_3^- to I_2 and itself oxidised to I_2 in acidic medium. Final reaction is
- For the redox reaction, MnO_4^- + C_2O_4^ 2- + H^+ Mn^ 2+ + CO_2 + H_2O , the correct coefficients of the reactants for the...
- Hot concentrated sulphuric acid is a moderately strong oxidising agent. Which of the following reaction does not show oxidising...
- Choose the disproportionation reaction among the following redox reactions.
- In which of the following reactions, H_2O_2 acts as a reducing agent?
- Observe the following reaction, 2 NO_2(g) + 2 OH^-(aq) NO_3^-(aq) + H_2O(l) + NO_2^-(aq) In this reaction,
- In acidic medium, H_2O_2 changes Cr_2O_7^ 2- to CrO_5 which has two (-O-O-) bonds. Oxidation state of Cr in CrO_5 is
- The oxidation number of Cr in K_2Cr_2O_7 is
- The oxidation number of sulphur in Na_2S_2O_3 is
- Both oxidation and reduction takes place in
- Which one of the following cannot acts as a reducing agent?
- In the reaction, Ag_2O + H_2O_2 2 Ag + H_2O + O_2 , H_2O_2 acts as
- Which of the following is the example of a disproportionation reaction?
- Which combination appears odd with respect to oxidation number per atom of the underlined?
- Nitric oxide acts as a reducing agent in the reaction
- In which of the following, the oxidation number of oxygen has been arranged in increasing order?