Answer :

(i) Statements A and R both are correct and R is the correct explanation of A.


Some metals like platinum and palladium can be used as storage media for hydrogen as they will not react with the atomic hydrogen due to their inertness.


They absorb large volumes of hydrogen as they have high surface area which allows hydrogen to get adsorbed over their surface.


These properties are utilized in many chemical reactions where hydrogen adsorbed over Pt or Pd is used as a catalyst.


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