Redox Reactions Mock Test – Class 11 Chemistry

1. A compound contains , , and no peroxide linkage is indicated. The most suitable first assignments for are:

2. A table gives two possible cells.

Which decision is correct?

3. The entry that correctly applies fixed oxidation-number rules is:

4. In the same galvanic cell, the copper electrode is the cathode because:

5. The safest statement about oxidation number and actual charge is:

6. A table gives the tendency of some metals to be oxidised.

The strongest reducing agent in this table is:

7. An equation-balancing note says, “After electron balance, remaining atoms must still be balanced.” This is necessary because:

8. The electron count is balanced in which paired set of half-reactions?

9. A claim says, “The Roman numeral in copper chloride means there are two chlorine atoms.” The best correction is:

10. A standard reduction potential table shows , , and , . The reaction most favoured as written is:

11. The oxidation number of chlorine changes across , , and as:

12. Assertion: is a disproportionation reaction.
Reason: Oxygen in has oxidation number , and it changes to both and .

13. The pair in which both oxidation numbers are assigned correctly is:

14. A table records corrosion-related ideas.

The row that needs correction is:

15. A claim says, “The -factor of is always .” The best correction is:

16. The set containing only non-redox reactions is:

17. In cell-potential calculations, a tabulated value is not multiplied by the coefficient of the half-reaction because:

18. A solution of is used in a reaction where . The normality of the solution is:

19. Use the arrangement described below.

If the net reaction is , the zinc electrode acts as:

20. In , the species oxidised is:

21. The disproportionation is balanced with product ratio because:

22. A decomposition reaction is redox only when:

23. A summary claim says, “A redox reaction is fully understood once only the oxidised species is named.” The best evaluation is:

24. Rusting of iron is best understood as a redox process because:

25. For , the oxidation number of carbon is:

26. A calculation for is written as , giving . The mistake is that:

27. The molar mass of is . In acidic medium, is reduced to . The equivalent mass of is:

28. In a redox reaction, the total increase in oxidation number must equal the total decrease in oxidation number because:

29. A statement says, “In redox, equivalent mass can be calculated without knowing the reaction.” The best evaluation is:

30. Study the exception table and choose the row that needs correction.

31. Assertion: In a metal displacement reaction, the spectator ion may be absent from the net ionic equation.
Reason: Spectator ions do not undergo oxidation-number change and cancel from the complete ionic equation.

32. In , the reaction is usually classified as non-redox because:

33. A halogen displacement reaction follows the order in oxidising strength. Bromine water is added to a solution containing chloride ions. The most suitable prediction is:

34. In acidic medium, oxidises according to . If of is mixed with of , the amount of left unreacted is:

35. A final overall redox equation still contains on one side after the two half-reactions have been added. The best diagnosis is:

36. A reaction is written as . The most reliable classification is:

37. Given and , the spontaneous galvanic cell direction under standard conditions is:

38. The salt bridge in a simple galvanic cell mainly:

39. Reduction at an electrode means that the reacting species:

40. Assertion: Every combination reaction is a redox reaction.
Reason: A combination reaction always forms only one product.

41. Study the table for the reaction .

The unsupported row is:

42. A proposed galvanic cell has under standard conditions. The safest interpretation is:

43. To convert an acidic-medium balanced equation into basic-medium form, the usual repair for is:

44. The notation and the oxidation state are most safely compared as follows:

45. A simplified corrosion note contains these half-processes:


The species reduced in the second half-process is:

46. For the acidic-medium equation

which reactant-side charge calculation is correct?

47. A table lists half-cell data.

The strongest reducing metal and strongest oxidising ion are respectively:

48. The main reason oxygen is commonly balanced by in acidic-medium redox balancing is that:

49. A claim says, “Paint protects iron only by changing iron's oxidation number to a safer value.” The better explanation is:

50. A complete redox cell answer should identify electrode processes before applying the voltage formula because: