Allied & ICAR Exam Bank • ALLIED_0720 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Thermal Processing and Kinetics

Subtopic: Thermal Processing and Kinetics

Question Statement:

Thermal death of microorganisms follows first-order reaction kinetics. The reaction rate constant $k$ is related to the decimal reduction time $D$ by:

Options:

  • (A) $k = \frac{2.303}{D}$
  • (B) $k = 2.303 D$
  • (C) $k = \frac{D}{2.303}$
  • (D) $k = D^2$

Answer Key:

A

Step-by-Step Solution & Explanation

Since $\ln(N_0/N) = k t$ and $\log_{10}(N_0/N) = t/D$, multiplying gives $k = \frac{\ln(10)}{D} = \frac{2.3026}{D}$.
← Previous (ALLIED_0719) Next (ALLIED_0721) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test