In the Arrhenius equation, the pre-exponential factor A is also called:
ABoltzmann constant
BHalf-life
CFrequency factor (or pre-exponential factor)
DActivation energy
Answer & Solution
Correct answer: C. Frequency factor (or pre-exponential factor)
**A** = the **frequency factor** (or pre-exponential factor).
It represents the rate of collisions with proper orientation (the limit of k as E_a → 0).
Specific to each reaction; independent of temperature.
Keep practising Unit 5A1: Reaction Rates and Rate Laws
Browse all Unit 5A1: Reaction Rates and Rate Laws questions for NEET UG, or explore more Chemistry topics.
Related questions
Time required to decompose SO₂Cl₂ to half of its initial amount is 60 min. Assuming first-For a zero-order reaction, if the initial concentration is doubled, the half-life:For a first-order reaction, if the initial concentration of N₂O₅ is 1.24 × 10⁻² mol L⁻¹ anFor a first-order reaction, the time required for 99.9% completion is approximately:On a plot of ln k versus 1/T (Arrhenius plot), what is the slope?The Arrhenius equation is:For a chemical reaction, with a rise in temperature by 10°C, the rate of reaction typicallA first-order reaction with rate constant k = 5.5 × 10⁻¹⁴ s⁻¹ has a half-life of approxima