Question

A chemical reaction may be reversible in nature. State the meaning of the term in italics . Givea reason why a catalyst is used in certain chemical reactions.

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Answer 1

Answer:

Reversible reactions are the reactions where reactants form products and products react together to form actual reactants.

A catalyst is a substance which increases or decreases the speed of the reaction.

For example when KClO3 is heated, oxygen is produced but the reaction is very slow. On adding MnO2, the reaction is faster.

N_2+3H_2\ ⇋\ 2NH_3N 2 +3H 2⇋ 2NH 3

[ Here, iron is used as catalysts.

SO2 as one of the reactants. 2SO_2+O_2\ ⇋\ 2SO_32SO2 +OO2⇋ 2SO 3

Answer 2

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Reversible reactions are the reactions where reactants form products and products react together to form actual reactants. A catalyst is a substance which increases or decreases the speed of the reaction. For example when KClO3 is heated, oxygen is produced but the reaction is very slow.