• # question_answer Which is most acidic of the following [J & K 2005] A) Methane B) Acetylene C) 1-butene D) Neo-pentane

The $s$-character of $C-H$ bond of acetylene is higher in comparison to $C-H$ bond of ethene and ethane. The electrons of the $C-H$ bond in acetylene are strongly held by carbon nuclei. This facilitates the removal of hydrogen as proton.