This geography problem is solved step by step below, with detailed explanations to help you understand the method and arrive at the correct answer.
ScanSolve AI Answer
Step 1: Test with acidified K_2Cr_2O_7 (orange solution), heated. Primary alcohol (Column A): Orange solution turns green (Cr_2O_7^2- Cr^3+). Secondary alcohol (Column B): Orange solution turns green (Cr_2O_7^2- Cr^3+). Tertiary alcohol (Column C): No colour change (remains orange). Step 2: Test with Lucas reagent (ZnCl_2 + conc. HCl), at room temperature. Primary alcohol (Column A): No reaction, solution remains clear. Secondary alcohol (Column B): White turbidity/ppt. appears after 5–10 min. Tertiary alcohol (Column C): White turbidity/ppt. appears immediately. Step 3: Iodoform test (I_2 + NaOH). Primary alcohol (Column A, e.g. CH_3CH_2OH): Yellow ppt. of iodoform + smell of iodoform. Secondary alcohol (Column B, e.g. CH_3CH(OH)CH_3): Yellow ppt. of iodoform + smell of iodoform. Tertiary alcohol (Column C, e.g. (CH_3)_3COH): No yellow ppt./no reaction. Column D: Colour change to green (test 1), no turbidity (test 2), no iodoform (test 3). Primary alcohol. Column E: Colour change to green (test 1), turbidity after delay (test 2), iodoform (test 3). Secondary alcohol. Column F: No colour change (test 1), immediate turbidity (test 2), no iodoform (test 3). Tertiary alcohol.