Question

3. Rank in order of decreasing basicity: HC=C: CHCHO CHC HINO H₂C=Cif I III IV V A. III >I>V > II > IV D. III > IV > II >V>I B. III > V > IV >> II E. IV > II >I> III > V C. V>I> III > II > IV

Answer 1

this is Most H₂ N :: as this becomes the AMMONIA GAS when joins with hydrogen ( IV)

CH₃ CH₂O AS THIS BECOMES ETHYL ALCOHOL ( II)

then the third most basic is acetyline gas HC C : ( I)

Most basic means the tendency to attract hydrogen ion is CH₃ CH₂ H AS THIS BECOMES ethane ( III)

then ethylene gas is is last one that means least basic ( V)

so the answer is E,