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GATE 2025 BT – Question 26

Fundamentals of Biological Engineering · Bioreaction Engineering: Kinetics of cell growth, substrate utilization and product formation, structured and unstructured models · 1 mark · Multiple select

Which of the following compounds have the same degree of reduction per carbon-mole?

  1. Glucose
  2. Lactic acid
  3. Acetic acid
  4. Formic acid

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Correct answer: (A) Glucose; (B) Lactic acid; (C) Acetic acid

Explanation

The degree of reduction per C-mol is $\gamma = 4 + \frac{H}{C} - \frac{2O}{C}$. For glucose ($CH_2O$), lactic acid ($C_3H_6O_3 = CH_2O$) and acetic acid ($C_2H_4O_2 = CH_2O$) it is 4. Formic acid ($CH_2O_2$) has $4 + 2 - 4 = 2$.