Question

Which feature of catalysts is illustrated by the following reactions?

(i) CO(g) + 2 H₂(g) → Cu/ZnO-Cr₂O₃ → CH₃OH(g)

(ii) CO(g) + H₂(g) → Cu → HCHO(g)

(iii) CO(g) + 3 H₂(g) → Ni → CH₄(g) + H₂O(g)

• A. Activity
• B. Selectivity
• C. Catalytic promoter
• D. Catalytic poison

Hint:

Selectivity means different catalysts give different products from the same reactants.

Answer 1

The Correct Option is B

Step 1: Same reactants give different products with different catalysts.
Step 2: This shows that catalysts direct the reaction towards specific products.