Question

Two percent of ethanol is added during the oxidation of chloroform to stop the formation of carbonyl chloride. In this reaction ethanol acts as.

• A. Auto catalyst
• B. Negative catalyst
• C. Positive catalyst
• D. None of these

Answer 1

Answer: (B)

Negative catalyst

Answer 2

Any substance which when added to a chemical reaction inhibit or decrease the rate of reaction is called negative catalyst. In $CHCl_{3}$ when two percent ethanol is added, it stops the formation of carbonyl chloride. So ethanol acts as negative catalyst.