Oxidation States and Their Stability

JEE Main Chemistry · d- and f-Block Elements · 19 questions, latest first

• Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with…20264 April, Shift 2 · Q62
• Among the following oxides of 3d elements, the number of mixed oxides are ____. Ti_2 O_3, V_2 O_4, Cr_2 O_3, Mn_3 O_4, Fe_3 O_4,…202622 January, Shift 2 · Q74
• Given below are some of the statements about Mn and Mn_2 O_7. Identify the correct statements. A. Mn forms the oxide Mn_2 O_7, in…202621 January, Shift 2 · Q59
• ' X ' is the number of acidic oxides among VO_2, V_2 O_3, CrO_3, V_2 O_5 and Mn_2 O_7. The primary valency of cobalt in.[Co(H_2…20257 April, Shift 2 · Q61
• The first transition series metal ' M ' has the highest enthalpy of atomisation in its series. One of its aquated ion (M^n+)…20257 April, Shift 1 · Q61
• Given below are two statements: Statement I: CrO_3 is a stronger oxidizing agent than MoO_3 Statement II: Cr(VI) is more stable…20253 April, Shift 2 · Q61
• The amphoteric oxide among V_2 O_3, V_2 O_4 and V_2 O_5, upon reaction with alkali leads to formation of an oxide anion. The…202528 January, Shift 2 · Q60
• Give below are two statements: Statement I: The higher oxidation states are more stable down the group among transition elements…20249 April, Shift 2 · Q69
• The electronic configuration of Cu(II) is 3 d^9 whereas that of Cu(I) is 3 d^10. Which of the following is correct?20249 April, Shift 1 · Q68
• The metal that shows highest and maximum number of oxidation state is:20245 April, Shift 1 · Q69
• A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of…20244 April, Shift 2 · Q86
• The element which shows only one oxidation state other than its elemental form is:20244 April, Shift 1 · Q69
• Choose the correct statements from the following A. Mn_2 O_7 is an oil at room temperature B. V_2 O_4 reacts with acid to give…202431 January, Shift 2 · Q69
• In chromyl chloride test for confirmation of Cl^- ion, a yellow solution is obtained. Acidification of the solution and addition…202429 January, Shift 1 · Q79
• In Chromyl chloride, the oxidation state of chromium is (+) ____.202315 April, Shift 1 · Q90
• Given below are two statements: one is labelled as Assertion and the other is labelled as Reason (R). Assertion: Cu^2+ in water…20231 February, Shift 2 · Q39
• Highest oxidation state of Mn is exhibited in Mn_2 O_7. The correct statements about Mn_2 O_7 are Mn is tetrahedrally surrounded…20231 February, Shift 1 · Q39
• The correct order of basicity of oxides of vanadium is202331 January, Shift 1 · Q39
• The set of correct statements is: (i) Manganese exhibits +7 oxidation state in its oxide. (ii) Ruthenium and Osmium exhibit +8…202329 January, Shift 2 · Q40