1. Tardigrade
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  3. Chemistry
  4. Assertion (A) Buffer solution are composed of strong acids and strong bases. Reason (R) It maintain the pH to a constant value of 7.4.

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Q. Assertion (A) Buffer solution are composed of strong acids and strong bases.
Reason (R) It maintain the $pH$ to a constant value of $7.4$.

AIIMSAIIMS 2017

Solution:

Both (A) and (R) are false as buffer solution are made by mixing weak acid with its salt of strong base or by mixing weak base with salt of strong acid. It is never formed by mixing strong acid and strong base.
The $pH$ of buffer solution remain constant but not always equal to $7.4$.