Redox Reactions questions
1186 published questions with worked solutions.
- Which of the following is the strongest oxidising agent?
- There are two types of sulphur with different oxidation states in the thiosulphate ion. The difference in oxidation states is...
- In the reaction XeO_3+6H^++6Fe^ 2+ Xe+3H_2O+6Fe^ 3+ , equivalent mass of XeO_3= molar mass .......
- There is also formation of insoluble CuS (black) when copper reacts with conc. H_2SO_4. What is the change in oxidation number of...
- How many of the following have underlined atoms in different oxidation states? K_2Hg I_4 , Ca(O)( Cl ) Cl , Na_2 S_2 O_3, Na_2...
- Br^- and BrO_3^- in acidic medium combine to form Br_2: 5Br^-+BrO_3^-+xH^+ 3Br_2+3H_2O. The value of x is ......
- 500 mL of chlorine-contaminated water is treated with KI, and the liberated iodine required 100 mL of 0.01 M hypo (sodium...
- How many of the following can act as an oxidising agent: H_2S, H_2SO_4, H_2SO_3, H_2S_2O_3?
- SO_2 reduces Cr_2O_7^ 2- to Cr^ 3+ ; the change in oxidation number of Cr is ......
- SO_2 reduces MnO_4^- to Mn^ 2+ . The number of electrons involved in the reduction of MnO_4^- to Mn^ 2+ is ......
- 6.35 g of impure bleaching powder paste is mixed with KI, and the I_3^- formed required 50 mL of 0.1 M hypo in neutral medium....
- Cl_2 disproportionates to Cl^- and species A such that the equivalent mass of Cl_2 is 71. Thus the oxidation number of chlorine...
- CaOCl_2 (bleaching powder) has two types of chlorine with different oxidation numbers. The sum of these oxidation numbers is...
- In the reaction XeF_2+BrO_3^-+H_2O Xe+BrO_4^-+2HF, equivalent mass of BrO_3^-= molar mass .......
- 3Cl_2+xNaOH 5NaCl+NaClO_3+3H_2O. The value of x is......
- 4.35 g of pyrolusite (MnO_2 mineral) is digested with conc. HCl and KI added. The mixture required 5 mL of 1 M Na_2S_2O_3...
- In the reduction of HNO_3 to N_2O, the number of moles of electrons involved per mole of HNO_3 is:
- White phosphorus reacts with caustic soda to give PH_3 and NaH_2PO_2. This reaction is an example of:
- In the reaction 2Ag+2H_2SO_4 Ag_2SO_4+2H_2O+SO_2, H_2SO_4 is:
- Oxygen exhibits a positive oxidation state with:
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