Question

Assertion (A) Buffer system of carbonic acid and sodium bicarbonate is used for the precipitation of hydrolysis of third group elements.
Reason (R) It maintains the $pH$ to a constant value about $7.4$.

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$
• C. $A$ is correct; $R$ is incorrect
• D. $A$ is incorrect; $R$ is correct

Answer 1

Answer: (D)

In biological systems, buffer solution of carbonic acid and sodium bicarbonate is found in our blood. It maintains the $pH$ of blood to a constant value of about $7.4$.
Thus, $A$ is incorrect but $R$ is correct.