Question

What is the role of glycerol in the decomposition of hydrogen peroxide?

• A. It increases the reaction rate.
• B. It reduces the reaction rate.
• C. It increases the enthalpy of the reaction.
• D. It increases the rate of collisions between reactant molecules.

Hint:

Glycerol is added to hydrogen peroxide as a stabiliser, which slows its decomposition.

Answer 1

The Correct Option is B

Step 1: Storage of H2O2
Commercial hydrogen peroxide solutions are kept with small amounts of stabilisers such as glycerol, acetanilide or urea.

Step 2: Effect
These substances act as negative catalysts, so the rate of decomposition drops. Option (B).

Final Answer:
It reduces the rate. \[ \boxed{\text{(B)}\ \text{It reduces the reaction rate}} \]