19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is a disproportionation reaction? (a) Cu O 2H Cu Cu H O -> (b) 2CrO 2H Cr O H O -> (c) CaCO 2H Ca H O CO -> (d) Cr O 2O H 2CrO H O -> Ans (a) Sol. A chemical reaction in whic…
Which of the following statements about the following reaction is correct? 2Cu O s Cu S s 6Cu s 5O g ->
Which of the following compounds can be oxidised further with a strong oxidising agent?
Match the reactions given in column I with the number of electrons lost or gained in column II Column – 1 Column – 2 Reaction Number of electrons lost or gained a. Mn OH H O MnO -> p. b. AlCl 3K Al 3KCl -> q. c. …
In which of the following compounds is the oxidation state of carbon is zero?
Which of the following statements is wrong?
Which of the following statements is incorrect?
Consider the following unbalanced redox reaction: H2O + AX + BY -> HA + OY + X2B The possible oxidation states of B and Y in BY are, respectively,
Which of the following will not be oxidized by O3?
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
An element exhibits an oxidation state -2. How many electrons are present in its outer shell?
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