The substance that increases the efficiency of a catalyst is called a:
A. Promoter
B. Reactant
C. Poison
D. Inhibitor
Answer: Option A
Solution (By JKSSB Mock Tests)
A promoter is a substance that, when added in small quantities, enhances the activity or efficiency of a catalyst. For example, in the Haber process, molybdenum acts as a promoter for the iron catalyst. An inhibitor or poison decreases catalyst activity by blocking active sites.
Explanation:
Haber process: N₂ + 3H₂ ⇌ 2NH₃ using finely divided iron catalyst with promoters (K₂O, Al₂O₃). Pt in Ostwald for HNO₃, V₂O₅ in Contact for H₂SO₄, Ni in hydrogenation.
Explanation:
Charles' law: V ∝ T at constant pressure and for a fixed mass (n constant). If pressure or amount changes, the relationship does not hold. The temperature must be in Kelvin.
Explanation:
Ant sting contains formic acid (methanoic acid, HCOOH). It causes a burning sensation. It can be neutralized by applying a mild base like baking soda. Acetic acid is in vinegar, citric acid in lemons, lactic acid in curd.
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