MCQ
On combining which of the following anion with $\mathop {N{H_4}}\limits^{\,\,\,\,\,\, \oplus } $ so that the $pH$ of the salt solution becomes independent of the concentration
- ✓$C{H_3}CO{O^\Theta }$
- B$C{l^\Theta }$
- C$NO_3^\Theta $
- D$SO_4^{ - 2}$