Question

Which of the following compounds is least likely to give effervescence of \(CO_2\) in presence of \(aq.\ NaHCO_3\) ?

(1) 

(2) 

(3) \(Ph - \overset{(+)}{NH_3} \overset{(-)}{Cl}\)

(4) 

Answer 1

Correct option is: (4)

Those compounds which are more acidic than \(H_2CO_3\) can give effervescence of \(CO_2\) with \(aq. \ NaHCO_3\) .

Release \(CO_2\uparrow\) gas with \(aq. \ NaHCO_3\) .

\(\Rightarrow [A.S.]_{\text{Comp.}} > [A.S.]_{H_2CO_3}\)

\(\rightarrow\) Option 1, 2 and 3 gives effervescence of \(CO_2\) gas with \(NaHCO_3\) .

\(\rightarrow \) Option (4) Not gives \(CO_2\) gas with \(NaHCO_3\).