Read the given paragraph and write answers of the following questions.
When any solid substance is kept in contact with liquid or gas, then liquid or gas are more adsorbed on the surface of solid rather than bulk. The process is known as adsorption. It is different from absorption. Many gaseous reaction occurs in the presence of solid catalyst. Catalyst is a chemical substance which change the rate of reaction without undergoing itself change. This phenomenon is known as catalysis.
(A)Write any two differences between Absorption and Adsorption.
(B) Write any chemical equation of heterogeneous catalysis.
(C) Write the name of Zeolite catalyst used to convert Alcohol to Petrol.

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Solution

Absorption
Adsorption
1. Gas or liquid get equally distributed at the surface as well as in the inner bulk. Gas or liquid Get absorb at the surface only
2. It is a bulk phenomenon It is a surface phenomenon

$(B) 2 S O_{2} + O_{2} P T o r V_{2} O_{5} - ------ \to 2 S O_{3}$

(C) $Z S M - 5$

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A __ is a substance which changes the rate of a chemical reaction without itself undergoing any chemical change.

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Absorption	Adsorption
1. Gas or liquid get equally distributed at the surface as well as in the inner bulk.	Gas or liquid Get absorb at the surface only
2. It is a bulk phenomenon	It is a surface phenomenon