19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
What is the stoichiometric coefficient of Ca in the reaction? Ca Al Ca Al ->
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
When copper is treated with a certain concentration of nitric acid, nitric oxide and nitrogen dioxide are liberated in equal volumes according to the equation. o xC u yH NO Cu NO NO NO H O -> The coefficients …
Balance the following equation and choose the correct value of sum of coefficients of the products: CS Cl CCl S Cl ->
In the reaction, ->Br2 + xBrO yCr zH O HCrO H , REDOX REACTIONS the coefficients x, y and z are
For the reaction: NH OCl N H Cl -> in basic medium, the coefficients of NH3,OCl and N2H4 for the balanced equation are respectively
In a balanced equation, H SO xHI H S yI zH O -> the value of x, y and z are
In the reaction, 2IO xSO 4H O 5SO 8H I -> The coefficient of SO2 in balanced equation is
In the redox reaction, xKMnO NH yKNO MnO KOH H O -> x and y are