Question

cl-
always spectator ion
not always spectator ion
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part b
no₃⁻
always spectator ion
not always spectator ion
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Explanation:

A spectator ion is one that does not participate in the actual chemical reaction. Chloride ($Cl^-$) can participate in reactions such as forming precipitates with silver ions ($Ag^+$) to form $AgCl$. Nitrate ($NO_3^-$) is generally very stable and does not participate in many reactions under normal conditions, but in acidic solutions with a reducing agent present, it can be reduced. So neither is always a spectator ion.

Answer:

For $Cl^-$: not always spectator ion
For $NO_3^-$: not always spectator ion