Question

In the following equation

\[\ce{x KI + H2O2 -> I2 + y KOH}\]

x and y respectively are:

Options

• 2, 2

• 1, 2

• 2, 1

• 1, 1

Answer 1

2, 2

Explanation:

The balanced chemical equation for the reaction between potassium iodide (KI) and hydrogen peroxide (H₂O₂) in a basic or neutral medium is:

\[\ce{x KI + H2O2 -> I2 + y KOH}\]

Left-hand side (Reactants): 2 K, 2 I, 2 H, 2 O

Right-hand side (Products): 2 I, 2 K, 2 O, 2 H

Comparing this to the equation:

\[\ce{x KI + H2O2 -> I2 + y KOH}\]

x (coefficient of KI) = 2

y (coefficient of KOH) = 2

Therefore, x and y are 2 and 2, respectively.