19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A metal ion M3+ loses 3 electrons, its oxidation number will be :
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…
Which of the following reactions do not involve oxidation-reduction? I.2Rb 2H O 2RbOH H II.2CuI 2CuI I III.NH Br KOH KBr NH H O IV.4KCN Fe CN K Fe CN -> -> -> ->
Which of the following is not a redox reaction? (a) CaCO CaO CO -> (b) O 2H 2H O -> (c) Na H O NaOH H -> (d) MnCl MnCl Cl -> REDOX REACTIONS Ans (a) Sol. a. Oxidation states of Ca and C are +2 and +4, respec…
Assertion: F2 undergoes disproportionation reaction. Reason: Fluorine shows both positive and negative oxidation states.
Match the reactions in column I with their respective characteristics given in column II Column – 1 Column – 2 Name and Reaction Characteristics a. P PH H PO -> p. Fractional oxidation number b. C O q. c. CH Cl r. Na…
In the equation NO H O NO 2H ne -> n stands for
In the ionic equation, BiO 6H xe Bi 3H O -> the value of x is
The ratio of stoichiometric coefficient of Fe2+ and MnO
MnO4 - is a good oxidizing agent in different medium changing to MnO Mn MnO MnO Mn O -> -> -> -> Changes in oxidation number respectively, are
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 …
In the reaction, SO 2H S 3S 2H O -> the substance oxidized is
An oxidation process involves
In the reaction o o ½ K O KO ->
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 ->
The number of electrons lost in the following change is Fe H O Fe O H ->
In the reaction o 5 2 3Cl 6NaOH Na ClO 5Na Cl 3H O -> The element which loses as well as gains electrons is
In the reaction 3Br 6CO 3H O 5Br BrO 6HCO ->
In the reaction 2FeCl H S 2FeCl 2HCl S ->
Assertion (A): H2O2 can acts as an oxidizing agent. Reason (R): All the peroxides behave as oxidizing agents only.
In which of the following pairs is there the greatest difference is the oxidation numbers of the oxidation numbers of the central atom?
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 in the oxidation numbers of the underlined elements?
In which of the following is the highest oxidation state not possible?
Which of the following acids possesses oxidizing, reducing and complex forming properties? REDOX REACTIONS