MCQ
Which of the following is the weakest base ?
- A$NaOH$
- B$Ca(OH)_2$
- ✓$NH_4OH$
- D$KOH$
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(Molar mass of $Fe =56\, g\, mol ^{-1}$ )
$Cu(s) + 2Ag^+(aq) \to Cu^{2+}(aq) + 2Ag(s)$
$E^o = 0.46\,V$ at $298\,K$ is approximately
$(a) P_2O_7^{4-}$ $(b) S_2O_5^{2-}$
$(c) S_2O_7^{2-}$ $(d) Cl_2O_7$
$(e) Mn_2O_7$ $(f) S_2O_8^{2-}$