19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In the compound YBa₂Cu₃O₇ which shows superconductivity, what is the oxidation state of Cu? Assume that the rare earth element yttrium is in its usual +3 oxidation state. (a) (b)
Assertion: HNO₃ acts only as an oxidizing agent, while HNO₂ acts both as an oxidizing agent and a reducing agent. Reason: The oxidation number of N in HNO₃ is maximum
Which of the following acids possesses oxidizing, reducing and complex forming properties? REDOX REACTIONS
In which of the following is the highest oxidation state not possible?
In which of the following pairs is there the greatest difference in the oxidation numbers of the underlined elements?
In which of the following cases is the oxidation state of N atom wrongly calculated?
In which of the following pairs is there the greatest difference is the oxidation numbers of the oxidation numbers of the central atom?
A mole of N₂H₄ loses 10 mol of electrons to form a new compound Y. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? (There is no change in the oxidation number …
MnO₄ - is a good oxidizing agent in different medium changing to MnO Mn MnO MnO Mn O → → → → Changes in oxidation number respectively, are
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is
The oxidation states of sulfur in the anions SO , S O and S O follow the order (a) S O S O SO (b) S O S O SO (c) S O SO S O (d) SO S O S O
Oxidation state of nitrogen is correctly given for Compound Oxidation State
+3 oxidation state is most common in
Oxidation number of iodide in IO ,IO ,KI and I respectively, are
When sulfur dioxide is passed in an acidified K₂Cr₂O₇ solution, the oxidation state of sulfur is changed from
The oxidation states of iodine in HIO₄, H₃IO₅ and H₅IO₆ respectively, are
In which of the following reactions, there is no change in valency? (a) SO 2H S 2H O 3S → (b) 2Na O 2Na O → (c) Na O H SO Na SO H O → (d) 4KClO 3KClO KCl → Ans (c) Sol. The oxidation states of central atom in each giv…
A metal ion M3+ loses 3 electrons, its oxidation number will be :
Which of the following molecules has least oxidation number of central atom?
In which of the compounds does manganese exhibit highest oxidation number?
In which of the following compounds, the oxidation number of iodine is fractional?
In which of the following compounds is the oxidation state of C a fraction?
In which of the following compounds is the oxidation state of C highest?
The oxidation states of the most electronegative elements in the products of the reaction between BaO₂ and H₂SO₄ are
Oxidation number of carbon in CCl is :