Question

a promoter increases the efficiency of the catalyst only in the case of positive catalyst or both positive and negative catalysts?​

Answer 1

Answer:

A promoter is increase the efficiency of catalyst in both +ve and -ve catalyst.

Answer 2

An Negative Catalyst is a substance that decreases the rate of a chemical reaction.

Lead tetraethyl as antiknock compound

Glycerol in decomposition of H

2

O

2

Ethanol in the oxidation of chloroform

All are act as Negative catalyst

Promoter, in chemistry, substance added to a solid catalyst to improve its performance in a chemical reaction. By itself the promoter has little or no catalytic effect. Some promoters interact with active components of catalysts and thereby alter their chemical effect on the catalyzed substance.