1.

(A): In chemisorption the adsorbed gas layer is unimolecular thick. (R): Valence forces exist between the particles of the adsorbent and the adsorbate but not between adsorbate particles among themselves.

Answer»

Both (A) and (R) are TRUE and (R) is the correct EXPLANATION of (A) 
Both (A) and (R) are true and (R) is not the correct explanation of (A) 
(A) is true but (R) is FALSE 
(A) is false but (R) is true 

ANSWER :A


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