Which one of the following gives yellow precipitate with iodine and NaOH solution?

Question

Which one of the following gives yellow precipitate with iodine and NaOH solution? (A) CH 3- CHO (B) C 6 H 5 COC 6 H 5 (C) HCHO (D) CH 3 OH

Tardigrade Admin · Accepted Answer

Alcohols containing CH 3 CH ( OH )- group and carbonyl compounds containing CH 3 CO - group give yellow precipitate with iodine and NaOH solution. This reaction is called iodoform test. Thus, CH 3 CHO due to presence of CH 3 CO group gives yellow ppt with I 2 and NaOH. CH 3 CHO +3 I 2+4 NaOH longrightarrow CHI 3 + HCOONa +3 NaI +2 H 2 O

Q. Which one of the following gives yellow precipitate with iodine and $N a O H$ solution?

$C H_{3} - C H O$

$C_{6} H_{5} CO C_{6} H_{5}$

$H C H O$

$C H_{3} O H$

Q. Which one of the following gives yellow precipitate with iodine and NaOH solution?

CH3​−CHO

C6​H5​COC6​H5​

HCHO

CH3​OH

Q. Which one of the following gives yellow precipitate with iodine and $N a O H$ solution?

$C H_{3} - C H O$

$C_{6} H_{5} CO C_{6} H_{5}$

$H C H O$

$C H_{3} O H$