is a substance added to improve the performance of a solid catalyst in a chemical reaction.

Collector

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Promoter

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Stabiliser

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Solution

The correct option is B Promoter
Catalysts are substances that increase the rate of a chemical reaction without itself getting consumed.

Promoters are substances added to improve the performance of a solid catalysts in a chemical reaction.

For example: Chromic oxide is used as a promoter along with the catalyst zinc oxide during the synthesis of methyl alcohol.

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Q. Assertion :Catalyst is a substance which takes part in a chemical reaction, undergoes chemical change and alters the rate of a reaction Reason: Catalyst is a substance which does not take part in a chemical reaction, but changes the rate of reaction

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Q. When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.
(a) What do you think substance X is likely to be?
(b) Name the substance which the yellow solid consists of.
(c) Which characteristic of chemical reaction is illustrated by this example?
(d) Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.

When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.

(a) What do you think substance X is likely to be ?

(b) Name the substance which the yellow solid consists of.

(c) Which characteristic of chemical reactions is illustrated by this example ?
(d) Write a balance chemical equation for the reaction which takes place. Mention the physical states of all the reactants adn products involved in the chemical equatio.

Q. A phenomenon during the course of chemical reaction in which some substance is formed which acts as a catalyst is known as :

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