Acidic strength of organic compounds is low. Acetylene is more acidic than

Acidic strength -4>2>1>C2H2>3;Oxygen atom can hold negative charge more easily than sp carbon which is better than sp3 carbon;Moreover acetate ion stabilize through resonance;Acetate ion is most stable; Stability of hydroxide ion is more than ethoxide ion because in ethoxide ion, the +I effect of alkyl group intensifies the negative charge and hence less stable;Thus basic strength of CH3COO->HO->CH3CH2O->HC≡C->CH3-Acidic strength of4>2>1>acetylene>3;