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  4. Which buffer solution comprising of the following has its pH value greater than 7?

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Q. Which buffer solution comprising of the following has its pH value greater than 7?

Rajasthan PETRajasthan PET 2010

Solution:

The pH value of basic buffer solutions is always greater than 7. Among the given, only $ N{{H}_{4}}OH+N{{H}_{4}}Cl $ constitutes the basic buffer (a mixture of weak base and its conjugated salt), thus, has pH greater than 7.