Correct any incorrect equations. If no reaction occurs, write NO REACTION.
(a) AgNO3(aq) + NaCl(aq) → NaCl(s) + AgNO3(aq)
(b) K2SO4(aq) + Co(NO3)2(aq) → CoSO4(s) + 2 KNO3(aq)
(c) Cu(NO3)2(aq) + (NH4)2S(aq) → CuS(s) + 2 NH4NO3(aq)
(d) Hg2(NO3)2(aq) + 2 LiCl(aq) → Hg2Cl2(s) + 2 LiNO3(aq)
(a)The first reaction is wrong: the correct reaction is given below,
AgNO3(aq) + NaCl(aq) NaNO3(aq) + AgCl(s)
This is because there will be a displacement reaction as Na is more reactive than Ag in the reactivity series. This may be a typing mistake so the reaction may be correct actually.
(b)K2SO4(aq) + Co(NO3)2(aq) → CoSO4(s) + 2 KNO3(aq)
Second reaction is correct (K more reactive than Co)