Which from following buffers is used to maintain the pH of human blood naturally?

Which from following buffers is used to maintain the pH of human blood naturally?
  1. Hydrogen cyanide and sodium cyanide
  2. Copper hydroxide and copper chloride
  3. Carbonic acid and salt of carbonic acid
  4. Ammonium hydroxide and ammonium chloride

Solution

The pH of human blood is maintained naturally at $7. 36-7.42$ by $\left(\mathrm{HCO}_3^{-}+\mathrm{H}_2 \mathrm{CO}_3\right)$ buffer.

Asked in: MHT CET 2024 (09 May Shift 2)

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