Hello can anyone please explain for me how to know the right answer ?
C
The No3- ion combines with H+ in water to give HNO3 which is a pretty strong acid. NH4OH is not that strong a base.
Cl- also forms a strong acid but it’s neutralised by the strong base ie NaOH that’s formed.
Same with HClO4 neutralised by strong base in Ca(OH)2
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