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  4. The compound whose aqueous solution has the highest PH is

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Q. The compound whose aqueous solution has the highest $PH$ is

AIPMTAIPMT 1988Equilibrium

Solution:

The hydrolysis of $NaCl$ gives neutral solution because it is salt of strong acid and strong base and hence, its $pH$ is $7. NH _{4} Cl$ is salt of weak base and strong acid, so its $pH$ is less than $7. NaHCO _{3}$ is also acidic whereas $Na _{2} CO _{3}$ is salt of strong base and weak acid, so its $pH$ is more than $7$ .