JEE Chemistry
Oxidation States & Ionisation Energies: JEE Questions & Solutions
15 previous-year JEE Chemistry questions on Oxidation States & Ionisation Energies, each with a worked step-by-step solution.
Previous-year questions
- 01Given below are two statements: Statement I: The first ionization enthalpy of Cr is lower than that of Mn. Statement II: The second and…MCQEasyJEE 2026
- 02Niobium (Nb) and ruthenium (Ru) have "x" and "y" number of electrons in their respective 4d orbitals. The value of x + y is:NVAEasyJEE 2025
- 03Which of the following ions is the strongest oxidizing agent? (Atomic Number of Ce = 58, Eu = 63, Tb = 65, Lu = 71)MCQEasyJEE 2025
- 04The spin-only magnetic moment (μ) value (B.M.) of the compound with the strongest oxidising power among Mn₂O₃, TiO, and VO is B.M. (Nearest…NVAMediumJEE 2025
- 05Given below are two statements: Statement I: CrO₃ is a stronger oxidizing agent than MoO₃ Statement II: Cr(VI) is more stable than Mo(VI)…MCQEasyJEE 2025
- 06The incorrect relationship in the following pairs in relation to ionisation enthalpies is:MCQMediumJEE 2025
- 07'X' is the number of acidic oxides among VO₂, V₂O₃, CrO₃, V₂O₅ and Mn₂O₇. The primary valency of cobalt in [Co(H₂NCH₂CH₂NH₂)₃]₂ (SO₄)₃ is…MCQMediumJEE 2025
- 08Match List-I with List-II: | List-I (Species) | List-II (Electronic distribution) | |---|---| | (A) Cr²⁺ | (I) 3d⁸ | | (B) Mn⁺ | (II) 3d⁵…MCQEasyJEE 2024
- 09A transition metal 'M' among Sc, Ti, V, Cr, Mn, and Fe has the highest second ionisation enthalpy. The spin-only magnetic moment value of…NVAMediumJEE 2024
- 10The set of correct statements is: (i) Manganese exhibits +7 oxidation state in its oxide. (ii) Ruthenium and Osmium exhibit +8 oxidation in…MCQEasyJEE 2023
- 11The correct order of basicity of oxides of vanadium is:MCQEasyJEE 2023
- 12Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): The first…MCQEasyJEE 2023
- 13Highest oxidation state of Mn is exhibited in Mn₂O₇. The correct statements about Mn₂O₇ are: (A) Mn is tetrahedrally surrounded by oxygen…MCQEasyJEE 2023
- 14In chromyl chloride, the number of d-electrons present on chromium is the same as in: (Given atomic numbers: Ti = 22, V = 23, Cr = 24, Mn =…MCQEasyJEE 2023
- 15In chromyl chloride, the oxidation state of chromium is (+).NVAEasyJEE 2023
Frequently asked questions
Our bank has 15 previous-year JEE Chemistry questions tagged to Oxidation States & Ionisation Energies, drawn from JEE papers between 2023 and 2026, including 1 from 2026 alone. Each comes with a full step-by-step solution.
Oxidation States & Ionisation Energies is rated Intermediate overall for JEE Chemistry. The PYQs on this page break down as 11 easy, 4 medium.
Of the 15 previous-year questions on Oxidation States & Ionisation Energies, 11 are multiple-choice (MCQ) and 4 are numerical-value (NVA) questions.
Based on recent paper analysis, Oxidation States & Ionisation Energies is worth about 1 mark in JEE Main. It sits in d- & f-Block Elements, a Class 12 Chemistry chapter.
More d- & f-Block Elements topics
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