Redox Reactions — practice questions
46 curated practice questions from Redox Reactions (Chemistry NEET, NTA Exams) — 25 easy, 9 medium, 12 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- The oxidation number of sulphur in S 8 , S 2 F 2 , H 2 S respectively, are:
- In which one of the following changes there is transfer of five electrons:
- Consider the following regarding processes: array l Zn ^ 2+ +2 e ^ - Zn ( ~s ) ; E ^ =-0.76 ~V Ca ^ 2+ +2 e ^ - Ca ( ~s…
- Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some…
- What is the oxidation number of chlorine in ClO _ 3 ^ - ?
- The conversion of sugar is: C _ 12 H _ 22 O _ 11 CO _ 2 ^
- What is the equivalent weight of HNO 3 in the given reaction: 4Zn + 10HNO 3 → 4Zn(NO 3 ) 2 + NH 4 NO 3 + 3H 2 O
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
- Aqueous solution of Na 2 S 2 O 3 on reaction with Cl 2 gives:
- Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show…
- The oxidation number of phosphorus in Ba(H 2 PO 2 ) 2 is:
- Oxidation number of Cl in CaOCl 2 (bleaching powder) is:
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Amongst the following, identify the species in +6 oxidation state?
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Given below are two statements: Statement I : The algebraic sum of the oxidation number of all the atoms in a compound…
- Among the following, the species, in which the oxidation number of an element is +6:
- Zn gives H 2 gas with H 2 SO 4 and HCl but not with HNO 3 because of:
- On balancing the given redox reaction, aCr _ 2 O _ 7 ^ 2- + bSO _ 3 ^ 2- ( mq )+ CH ^ + ( mq ) 2 aC r ^ 3+ ( mq )+ bSO…
- In the reaction of oxalate with permaganate in acidic medium, the number of electrons involved in producing one…
- Which of the following is correct about the reaction? 3 NaClO Heat NaClO _ 3 +2 NaCl
- Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below…
- The gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y - and 1 M Z - at 25° C . If the order of…
- During the disproportionation of I 2 to iodate and iodide ions, the ratio of iodate and iodide ions formed in alkaline…
- In the reaction, 5 O _ 2 +2 H _ 2 5 35+2 H _ 2 O the substance oxidised is:
- In the ionic equation: BiO _ 3 ^ - +6 H ^ + +x e ^ - Bi ^ 3+ +3 H _ 2 O , the values of X is:
- Excess of KI reacts with CuSO 4 solution and then Na 2 S 2 O 3 solution is added to it. Which of the statements is…
- The sum of the oxidation numbers of all the carbons in C 6 H 5 CHO is:
- The correct order N-compounds in its decreasing order of oxidation states is
- Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as…
- In acidic medium MnO _ 4 ^ - is reduced to Mn 2 + , by a reducing agent. Then, the equivalent mass of KMnO 4 is given…
- In the test for iodine, when I 2 is treated with sodium thiosulphate, Na 2 S 2 O 3 : Na _ 2 ~S _ 2 O _ 3 + I _ 2 NaI +
- Which is the best description of behaviour of bromine in the reaction given below? H _ 2 O + Br _ 2 HBr + HOBr
- In the reaction Br 2 + Na 2 CO 3 → NaBr + NaBrO 3 + CO 2 , the equivalent weight of NaBrO 3 is:
- In the conversion of Br 2 to Br O _ 1 ^ - , the oxidation number of Br changes from:
- The equivalent weight of Na 2 S 2 O 3 (Mol. Wt. = M) in the reaction; 2Na 2 S 2 O 3 + I 2 → Na 2 S 4 O 6 + 2NaI is:
- The number of moles of KMnO 4 that will be needed to react with one mole of sulphite ion in acidic solution is:
- Given below are two statements: Statement I : In a reaction, Zn (5)+ CuSO _ 4 ( aq ) ZnSO _ 4 ( aq )+ Cu (5) ; Zn is a…
- MnO _ 4 ^ - is a good oxidising agent in different medium, changing to aligned MnO _ 4 ^ - & Mn ^ 2+ & MnO _ 4 ^ 2- &…
- The equivalent weight of Mohr's salt FeSO 4 (NH 4 ) 2 SO 4 .6H 2 O in redox change is equal to its:
- In a reaction between zinc and iodine, zinc iodide is formed. What is being oxidised?
- When Cu reacts with AgNO 3 solution, the reaction that takes place is:
- Which of the following reactions are disproportionation reaction? 2 Cu ^ + Cu ^ 2+ + Cu ^ 8 3 MnO _ 4 ^ 2- +4 H ^ + 2…
- The number of moles of KMnO 4 that will be needed to react completely with one mole of ferrous oxalate in acidic medium…
- What is the change in oxidation number of carbon in the following reaction? CH _ 4 ( ~g )+4 Cl _ 2 ( ~g ) CCl _ 4 ( l…
- For the redox reaction, MnO _ 4 ^ - + C _ 2 O _ 4 ^ 2- + H ^ + Mn ^ 2+ + CO _ 2 + H _ 2 O The correct coefficients of…