19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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 i…
A metal ion M3+ loses 3 electrons, its oxidation number will be :
Which of the following molecules has least oxidation number of central atom?
The oxidation number of xenon is XeOF2 is
The oxidation number of nitrogen in NaNO2 is
The oxidation state of chromium in Cr(CO)6 is:
Oxidation number of nitrogen in (NH4)2SO4 is
In the following equation MnO2 acts as MnO 2H O 2e MnO 4OH ->
Assertion (A): SO2 and Cl2 are both bleaching agents Reason (R): Both are reducing agents
Assertion (A): H2O2 can acts as an oxidizing agent. Reason (R): All the peroxides behave as oxidizing agents only.
In the reaction 2FeCl H S 2FeCl 2HCl S ->
In the reaction 3Br 6CO 3H O 5Br BrO 6HCO ->
In the reaction o 5 2 3Cl 6NaOH Na ClO 5Na Cl 3H O -> The element which loses as well as gains electrons is
The number of electrons lost in the following change is Fe H O Fe O H ->
Which of the following is the best description of the behaviour of bromine in the reaction given below? o H O Br HOBr H Br ->
In the reaction o o ½ K O KO ->
The oxidation number of C in CH2O is
In the reaction, SO 2H S 3S 2H O -> the substance oxidized is
Oxidation number of carbon in CCl is :
The oxidation states of the most electronegative elements in the products of the reaction between BaO2 and H2SO4 are
The oxidation state of C in diamond is
In which of the following compounds is the oxidation state of C highest?