Easy Practice — Set 2 — JEE Main 2027 Chemistry Notes

Quick Recap — Salt Analysis & Preparations

Anions: carbonate, sulphide, sulphite (gas evolution with acid); halide (AgX), sulphate ( $BaSO_4$ ), nitrate (brown ring), phosphate (yellow with ammonium molybdate).
Cation groups: I (Pb, Ag, Hg $_2$ )/HCl; II (Cu, Pb, …)/ $H_2S$ acid; III (Fe, Al, Cr)/ $NH_4OH$ ; IV (Zn, Mn, Ni, Co)/ $H_2S$ basic; V (Ba, Sr, Ca)/carbonate; VI (Mg).
Titrations: acid-base (choose indicator by strength), redox ( $KMnO_4$ , $K_2Cr_2O_7$ , iodometry), $N_1V_1=N_2V_2$ .
Preparations: double salt (Mohr's salt), potash alum, aspirin, dyes.