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NDA 1 2024 GAT, question 99

Topic: Chemistry

Q99

Human body works in the pHpH range of :

  1. (a) 6.8−7.26.8-7.2
  2. (b) 7.0−7.87.0-7.8Correct answer
  3. (c) 6.5−7.56.5-7.5
  4. (d) 7.5−8.07.5-8.0

Solution.

Answer: (b) 7.0−7.87.0-7.8

  1. School textbooks give 7.0 to 7.8 as the pH range in which the human body works.
  2. So (b) is the answer.

Trap: Different body fluids differ: blood is kept near 7.4 and the stomach is strongly acidic; the range is a general textbook figure.