Answer:
The decreasing order of acidic
strength:
Hydro-carbon:
Ethyne >
Benzene >
n-Hexane
Type of orbital:
\[\underset{sp}{\mathop{H-C\equiv
\overset{sp}{\mathop{C}}\,-H}}\,\]
\[\underset{s{{p}^{3}}}{\mathop{C{{H}_{3}}-{{(C{{H}_{2}})}_{4}}\overset{s{{p}^{3}}}{\mathop{C{{H}_{3}}}}\,}}\,\]
s-Character:
\[50%\]
\[33.3%\]
\[25%\]
The acidic character is linked
with percentage of s-character. Greater the s-character, more is the electro negativity
of the carbon atom and more will be the acidic character.
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