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Equilibrium — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEquilibrium1 Mark
MCQ
What do you mean by buffer solution?
  • A
    Buffer solution have no $\ce{pH}.$
  • ✓
    Its $\ce{pH}$ changes very little when a small amount of acid or base is added to the it.
  • C
    Its $\ce{pH}$ changes very largely when a small amount of acid or base is added to the it.
  • D
    All solutions are buffer.
✓

Answer

Correct option: B.
Its $\ce{pH}$ changes very little when a small amount of acid or base is added to the it.
It's $\ce{pH}$ changes very little when a small amount of strong acid or base is added to it.
Buffer solutions are used as a means of keeping $\ce{pH}$ at a nearly constant value in a wide variety of chemical applications. In nature, there are many systems that use buffering for $\ce{pH}$ regulation. For example, the bicarbonate buffering system is used to regulate the $\ce{pH}$ of blood.

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