JEE MAIN · CHEMISTRY · REDOX REACTIONS
JEE Main Redox Reactions Questions & Solutions
49 solved questions on Redox Reactions, ranging from easy to JEE-Advanced-flavour hard. Click any to see the full solution.
49 solved questions on Redox Reactions, ranging from easy to JEE-Advanced-flavour hard. Click any to see the full solution.
The oxidation states of 'P' in H4P2O7, H4P2O5 and H4P2O6, respectively, are :
View solution →0.1 M solution of KI reacts with excess of $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{KIO}_3$ solutions. According to equation $$ 5 \mathrm{I}^{-}+\mathrm{IO}_3^{-}+6…
View solution →The oxidation number of iron in the compound formed during brown ring test for NO$_3^-$ iron is ________.
View solution →Only $2 \mathrm{~mL}$ of $\mathrm{KMnO}_4$ solution of unknown molarity is required to reach the end point of a titration of $20 \mathrm{~mL}$ of oxalic acid $(2 \mathrm{M})$ in…
View solution →See the following chemical reaction: $$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{XH}^{+}+6 \mathrm{~F}_{e}^{2+} \rightarrow \mathrm{YCr}^{3+}+6 \mathrm{~F}_{e}^{3+}+\mathrm{Z}…
View solution →The volume, in mL, of 0.02 M K2Cr2O7 solution required to react with 0.288 g of ferrous oxalate in acidic medium is _______. (Molar mass of Fe = 56 g mol–1)
View solution →Number of moles of $\mathrm{H}^{+}$ ions required by $1 \mathrm{~mole}$ of $\mathrm{MnO}_4^{-}$ to oxidise oxalate ion to $\mathrm{CO}_2$ is _________.
View solution →The normality of $\mathrm{H}_{2} \mathrm{SO}_{4}$ in the solution obtained on mixing $100 \mathrm{~mL}$ of $0.1 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}$ with $50…
View solution →Which of the following cannot function as an oxidising agent?
View solution →The oxidation states of nitrogen in NO, NO2, N2O and NO$_3^ -$ are in the order of :
View solution →The redox reaction among the following is :
View solution →0.4 g mixture of NaOH, Na2CO3 and some inert impurities was first titrated with ${N \over {10}}$ HCl using phenolphthalein as an indicator, 17.5 mL of HCl was required at the end…
View solution →The number of ions from the following that are expected to behave as oxidising agent is : $$\mathrm{Sn}^{4+}, \mathrm{Sn}^{2+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{3+},…
View solution →When $\mathrm{MnO}_2$ and $\mathrm{H}_2 \mathrm{SO}_4$ is added to a salt $(\mathrm{A})$, the greenish yellow gas liberated as salt (A) is :
View solution →$$2 \mathrm{MnO}_4^{-}+\mathrm{bI}^{-}+\mathrm{cH}_2 \mathrm{O} \rightarrow x \mathrm{I}_2+y \mathrm{MnO}_2+z \overline{\mathrm{O}} \mathrm{H}$$ If the above equation is balanced…
View solution →In alkaline medium, $\mathrm{MnO}_4^{-}$ oxidises $\mathrm{I}^{-}$ to
View solution →The oxidation states of transition metal atoms in K2Cr2O7, KMnO4 and K2FeO4, respectively, are x, y and z. The sum of x, y and z is _______.
View solution →Oxidation number of potassium in K2O. K2O2 and KO2 respectively is :
View solution →In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the product is $(+)$ _________.
View solution →10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is _________ $\times$…
View solution →The species which does not undergo disproportionation reaction is :
View solution →A 100 mL solution was made by adding 1.43 g of Na2CO3.xH2O. The normality of the solution is 0.1 N. The value of x is _____. (The atomic mass of Na is 23 g/mol)
View solution →Identify the process in which change in the oxidation state is five :
View solution →The sum of oxidation state of the metals in $\mathrm{Fe}(\mathrm{CO})_{5}, \mathrm{VO}^{2+}$ and $\mathrm{WO}_{3}$ is ___________.
View solution →Given below are two statements: Statement I : In redox titration, the indicators used are sensitive to change in $\mathrm{pH}$ of the solution. Statement II : In acid-base…
View solution →Dichromate ion is treated with base, the oxidation number of Cr in the product formed is ___________.
View solution →Given below are two statements: one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$. Assertion A: Phenolphthalein is a $\mathrm{pH}$…
View solution →A compound 'X' is a weak acid and it exhibits colour change at pH close to the equivalence point during neutralization of NaOH with $\mathrm{CH}_{3} \mathrm{COOH}$. Compound 'X'…
View solution →$20 \mathrm{~mL}$ of $0.02\, \mathrm{M}$ hypo solution is used for the titration of $10 \mathrm{~mL}$ of copper sulphate solution, in the presence of excess of KI using starch as…
View solution →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 is…
View solution →$$2 \mathrm{IO}_{3}^{-}+x \mathrm{I}^{-}+12 \mathrm{H}^{+} \rightarrow 6 \mathrm{I}_{2}+6 \mathrm{H}_{2} \mathrm{O}$$ What is the value of $x$ ?
View solution →The compound that cannot act both as oxidising and reducing agent is :
View solution →While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
View solution →Which of the given reactions is not an example of disproportionation reaction?
View solution →Which of the following options are correct for the reaction $$2\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \rightarrow 2…
View solution →In acidic medium, $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ shows oxidising action as represented in the half reaction: $$ \mathrm{Cr}_2 \mathrm{O}_7{…
View solution →Which of the following reactions are disproportionation reactions? (A) $\mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}$ (B) $3 \mathrm{MnO}_4^{2-}+4 \mathrm{H}^{+}…
View solution →Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial,…
View solution →Thiosulphate reacts differently with iodine and bromine in the reactions given below: $$\begin{aligned} & 2 \mathrm{~S}_2 \mathrm{O}_3^{2-}+\mathrm{I}_2 \rightarrow \mathrm{S}_4…
View solution →Which of the following oxidation reactions are carried out by both $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ and $\mathrm{KMnO}_4$ in acidic medium? A. $\Gamma^{-} \rightarrow…
View solution →Match the List - I with List - II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial,…
View solution →Given below are two statements: Statement I: In the oxalic acid vs $\mathrm{KMnO}_4$ (in the presence of dil $\mathrm{H}_2 \mathrm{SO}_4$ ) titration the solution needs to be…
View solution →The neutralization occurs when 10 mL of 0.1M acid 'A' is allowed to react with 30 mL of 0.05 M base M(OH)2. The basicity of the acid 'A' is __________. [M is a metal]
View solution →0.01 M KMnO4 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 KMnO4 solution left in the…
View solution →Sum of oxidation states of bromine in bromic acid and perbromic acid is ___________.
View solution →In ammonium - phosphomolybdate, the oxidation state of Mo is + ___________
View solution →In alkaline medium, the reduction of permanganate anion involves a gain of __________ electrons.
View solution →Total number of species from the following which can undergo disproportionation reaction is ________. $$\mathrm{H}_2 \mathrm{O}_2, \mathrm{ClO}_3^{-}, \mathrm{P}_4, \mathrm{Cl}_2,…
View solution →Some $\mathrm{CO}_2$ gas was kept in a sealed container at a pressure of 1 atm and at 273 K . This entire amount of $\mathrm{CO}_2$ gas was later passed through an aqueous…
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