Among the following compounds, the one(s) that gives (give)effervescence with aqueous NaHCO3 solution is (are) undersetI(CH3CO)2O undersetIICH3COOH undersetIIIPhOH undersetIVCH3COCHO

Question

Among the following compounds, the one(s) that gives (give)effervescence with aqueous NaHCO3 solution is (are) undersetI(CH3CO)2O undersetIICH3COOH undersetIIIPhOH undersetIVCH3COCHO (A) I and II (B) I and III (C) only II (D) I and IV

Tardigrade Admin · Accepted Answer

Only carboxylic acids and their derivatives like anhydride are capable to give effervescence with aqueous

N a H C O_{3}

solution, because they are more acidic as compared to

H_{2} C O_{3}

(carbonic acid).

II C H_{3} COO H + N a H C O_{3} ⟶ C H_{3} COON a + H_{2} O + C O_{2}

I (C H_{3} CO)_{2} O + 2 N a H C O_{3} ⟶ 2 C H_{3} COON a + H_{2} O + C O_{2}

Q. Among the following compounds, the one(s) that gives (give)effervescence with aqueous NaHCO3​ solution is (are) I(CH3​CO)2​O​IICH3​COOH​IIIPhOH​IVCH3​COCHO​

I and II

I and III

only II

I and IV

Q. Among the following compounds, the one(s) that gives (give)effervescence with aqueous $N a H C O_{3}$ solution is (are)
$I (C H_{3} CO)_{2} O II C H_{3} COO H III P h O H I V C H_{3} COC H O$