| (i) \[{{C}_{6}}{{H}_{6}}\] |
| (ii) \[CH\equiv CH\] |
| (iii) \[{{H}_{3}}C-C{{H}_{3}}\] |
| (iv) \[{{H}_{2}}C-C{{H}_{2}}\] |
A) \[I>II>III>IV\]
B) \[II>IV>I>III\]
C) \[III>I>IV>II\]
D) \[III>IV>II>I\]
Correct Answer: B
Solution :
C?C bond length in \[{{C}_{6}}{{H}_{6}}\] is \[1.39\,\overset{o}{\mathop{A}}\,\], \[HC\equiv CH\] is \[1.20\,\overset{o}{\mathop{A}}\,\], \[{{H}_{3}}C-C{{H}_{3}}\] is \[1.54\,\overset{o}{\mathop{A}}\,\], \[{{H}_{2}}C=C{{H}_{2}}\] is \[1.34\,\overset{o}{\mathop{A}}\,\]. \[\therefore \] The correct order is \[HC\equiv CH<{{H}_{2}}C=C{{H}_{2}}<{{C}_{6}}{{H}_{6}}<{{H}_{3}}C-C{{H}_{3}}\] \[II<IV<I<III\]
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