The pH range of a human body is:

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  1. 2.35 - 4.45
  2. 5.35 - 6.45
  3. 7.35 - 7.45
  4. 8.35 - 9.45

Answer (Detailed Solution Below)

Option 3 : 7.35 - 7.45
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The correct answer is 7.35 - 7.45.

Key Points

  • The pH range of a human body is 7.35 - 7.45.
  • pH means the potential of Hydrogen.
  • The pH scale is the scale used to express the acidity or alkalinity of a substance based on the concentration of hydrogen ions in its solution.
  • pH scale was discovered by Soren Sorensen.
  • The range of pH scale 0 to 14.
    • If pH < 7 then solution is acidic.
    • If pH > 7 then solution is basic.
    • If pH = 7 then solution is neutral
  • The strength of acids and bases depends on the number of H+ ions and OH- ions produced, respectively.
  • When the pH of rainwater is less than 5.6, it is called acid rain.
  • The pH value of the Milk of Magnesia is 10.5.
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