$A$ solution of $H_3BO_3$ and borax is known as:

The most important buffer in the blood consists of

Assertion : In a titration of weak acid and $NaOH$,the $pH$ at half equivalence point is $pK_a$.
Reason : At half equivalence point,it forms an acidic buffer and the buffer capacity is maximum where $[acid] = [salt]$.

Addition of sodium hydroxide solution to a weak acid $(HA)$ results in a buffer of $pH \ 6$. If ionisation constant of $HA$ is $10^{-5}$,the ratio of salt to acid concentration in the buffer solution will be

What is a buffer solution? Explain the types of buffer solutions with examples and state their biological importance.

Which of the following is a buffer solution?