MCQ
$1 \,M$ $NaCl$ and $1 \,M$ $HCl$ are present in an aqueous solution. The solution is
- ✓Not a buffer solution with $pH < 7$
- BNot a buffer solution with $pH > 7$
- CA buffer solution with $pH < 7$
- DA buffer solution with $pH > 7$
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Atomic no. : $Mn = 25,\,Fe = 26,\,Co = 27,\,Ni = 28$