MHT CET 2024 Chemistry question

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

(A)Hydrogen cyanide and sodium cyanide
(B)Copper hydroxide and copper chloride
(C)Carbonic acid and salt of carbonic acidCorrect
(D)Ammonium hydroxide and ammonium chloride

Answer: (C)

Solution

Human blood is held at pH about 7.4 mainly by the carbonic acid-bicarbonate buffer, (a weak acid with its salt), supported by the phosphate and protein buffers. Added is consumed by and added is consumed by , so pH changes very little.

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Question ID VK-094858