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Solution


Q.

Which of the following compounds is least likely to give effervescence of CO2 in presence of aq. NaHCO3           [2025]
1  
2  
3 Ph-N(+)H3Cl(-)  
4  

Ans.

(4)

(4) is less acidic than H2CO3, hence does not give effervescence of CO2 with aq. NaHCO3.