jee_main_2025_28_jan_morning - Redox Reactions Topics

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QUESTION #27 Titration and Autocatalysis
Given below are two statements : Statement I: In the oxalic acid vs mathrmKMnO_4 (in the presence of dil mathrmH_2mathrmSO_4 ) titration the solution needs to be heated initially to 60^circmathrmC , but no heating is required in Ferrous ammonium sulphate (FAS) vs mathrmKMnO_4 titration (in the presence of dil mathrmH_2mathrmSO_4 ) Statement II : In oxalic acid vs mathrmKMnO_4 titration, the initial formation of mathrmMnSO_4 takes place at high temperature, which then acts as catalyst for further reaction. In the case of FAS vs mathrmKMnO_4 , heating oxidizes mathrmFe^2+ into mathrmFe^3+ by oxygen of air and error may be introduced in the experiment. In the light of the above statements, choose the correct answer from the options given below:
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QUESTION #28 Types of Redox Reactions
Match the List-I with List-II
List-I (Redox Reaction)List-II (Type of Redox Reaction)
AmathrmCH_4mathrm(g) + 2mathrmO_2mathrm(g) xrightarrowDelta mathrmCO_2mathrm(g) + 2mathrmH_2mathrmO(l)(I)Disproportionation reaction
B2mathrmNaH(s) xrightarrowDelta 2mathrmNa(s) + mathrmH_2mathrm(g)(II)Combination reaction
CmathrmV_2mathrmO_5mathrm(s) + 5mathrmCa(s) rightarrow 2mathrmV(s) + 5mathrmCaO(s)(III)Decomposition reaction
D2mathrmH_2mathrmO_2mathrm(aq) xrightarrowDelta 2mathrmH_2mathrmO(l) + mathrmO_2mathrm(g)(IV)Displacement reaction
Choose the correct answer from the options given below:
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