Q.

Baeyer’s reagent is                              [2024]

1 acidic potassium permanganate solution  
2 acidic potassium dichromate solution  
3 cold, dilute, aqueous solution of potassium permanganate  
4 hot, concentrated solution of potassium permanganate.  

Ans.

(3)

Baeyer's reagent is cold, dilute, aqueous solution of potassium permanganate (KMnO4).