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Practicing real exam questions helps you understand the exam pattern, improve accuracy, and boost your JEE score. Perfect for students aiming for top ranks in IIT-JEE.","tags","jee main joint entrance examination india","version","vip","location",{"_391":392,"_393":394},"type","Point","coordinates",[395,396],79.0888,21.1466,"in","priority",11,"createdOn",1756744302186,"updatedOn","questionsCount",24748,"courseCount",9,"examKey","questionData",{"_369":410,"_411":412,"_413":414,"_278":416,"_417":418,"_263":370,"_419":420,"_421":422,"_110":427},"263KGlDFUgSYpKUovh1ChqAj5nMrrk","q","How do we differentiate between Fe³⁺ and Cr³⁺ in group III?","ans",[415],1,"2002","course","chemistry","exp","FeCl₃ + 3NH₄OH $$ \\to $$ Fe(OH)₃ ↓(reddish brown) + 3NH₄Cl\n

CrCl₃ + 3NH₄OH $$ \\to $$ Cr(OH)₃ (Bluish green) + 3NH₄Cl","opts",[423,424,425,426],"by taking excess of NH₄OH solution","by increasing $$NH_4^+$$ ion concentration","by decreasing OH^- ion concentration","both (b) and (c)",22,"22","initComment","initReply","actionData","errors"]

JEE MAIN - Chemistry (2002 - No. 22)

Explanation

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