1.

Assertion (A) : Finely divided iron acts as a catalyst in Haber's process of manufacture of ammonia from nitrogen and hydrogen. Reason (R):Chemisorption of the reacting nitrogen and hydrogen gases on the surface of iron takes place.

Answer»

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

Answer :A


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