Redox Reactions: JEE Main Chemistry Previous Year Questions

163 previous year questions from Redox Reactions. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $2 MnO_{4}^{-} + bI^{-} + cH_{2} O \to xI_{2} + yMnO_{2} + zOH^{-} If the above equation is balanced with integer coefficient\dots$
2. $The reaction of sulphur in alkaline medium is given below:\dots$
3. $Total number of species from the following which can undergo disproportionation reaction______\dots$
4. $(A) HOCL + H_{2} O_{2} \to H_{3} O^{+} + C l^{-} + O_{2} (B) I_{2} + H_{2} O_{2} + 2 O H^{-} \to 2 I^{-} + 2 H_{2} O + O_{2} Choose the correct optio\dots$
5. $Which of the following statement is incorrect?$
6. $The species given below that does NOT show disproportionation reaction is:$
7. $K M n O_{4} oxidises I^{-} in acidic and neutral/faintly alkaline solution, respectively to$
8. $Compounds that should not be used as primary standards in titrimetric analysis are(redox) (A) Na_{2} Cr_{2} O_{7} (B) Oxalic acid(C) NaOH(D)\dots$
9. $In acidic medium, K_{2} Cr_{2} O_{7} shows oxidising action as represented in the half reaction\dots$
10. $In which of the following cases a chemical reaction is possible?$
11. $15 mL of aqueous solution of Fe^{2 +} in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr_{2} O_{7}^{2 -} The mo\dots$
12. $The brown ring test for nitrates depends on$
13. $A 20.0 mL solution containing 0.2 g impure H_{2} O_{2} reacts completely with 0.316 g of KMnO_{4} in acid solution. The purity of\dots$
14. $The number of moles of electron required to reduce 0.2 mole of Cr_{2} O_{7}^{2 -} to Cr^{+ 3}$
15. $The oxidation state of iron in K_{4} (Fe (CN)_{6}) is$
16. $The density of a monobasic strong acid (Molar mass 24.2 g mol) is 1.21 kg L. The volume of its solution required for the complete neutralization of 25 mL of 0.24 M NaOH i\dots$
17. $The volume of 0. 02 M aqueous HBr required to neutralize 10.0 mL of 0.01 M aqueous Ba (O H)_{2} is (Assume complete neutralization)$
18. $Among the following halogens F_{2}, Cl_{2}, Br_{2} and I_{2} Which can undergo disproportionation reactions?$
19. $What is the oxidation state of carbon in CaC_{2} and K_{2} C_{2} O_{4} respectively?$
20. $The following reaction occurs in acidic medium KMnO_{4} + 8 H^{+} + 5 e^{-} ⟶ K^{+} + Mn^{2 +} + 4 H_{2} O What is the equivalent weight of\dots$
21. $Consider the following reduction processes: Z n^{2 +} + 2 e^{-} \to Zn (s); E ° = - 0.76 V \dots$
22. $The exact volumes of 1 MNaOH solution required to neutralise 50 mL of 1 MH_{3} PO_{3} solution and 100 mL of\dots$
23. $In alkaline medium, the reduction of permanganate anion involves a gain of____________electrons.$
24. $The number of moles of ferrous exalate oxidised by one mole of KMnO_{4} in acidic medium is$
25. $0.01 M K M n O_{4} solution was added to 20.0 mL of 0.05 M Mohr's salt solution through a burette. The initial reading of 50 mL burette is zero. The volume of K M n O_{4} s\dots$

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Redox Reactions: JEE Main Chemistry Previous Year Questions

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