List of top Chemistry Questions on Redox reactions asked in VITEEE

Which of the following is an example of a redox reaction?

A reaction involving \( K_2 \text{Cr}_2 \text{O}_7 \) is treated with hydrogen sulfide. The oxidation number of chromium changes from +3 to +6, +2, or remains unchanged. Which of the following correctly reflects the change in oxidation number?

Acidified potassium dichromate is treated with hydrogen sulfide. In the reaction, the oxidation number of chromium:

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, \[ xCu + yHNO_3 \rightarrow Cu(NO_3)_2 + NO + NO_2 + H_2O \] The coefficients of \( x \) and \( y \) are respectively

Iodine is formed when potassium iodide reacts with a solution of?

In the reaction, \[ 8Al + 3Fe_2O_3 \longrightarrow 4Al_2O_3 + 9Fe \] the number of electrons transferred from the reductant to the oxidant is?