Increasing order of carbon-carbon bond length for the following is :
(i) `C_(2)H_(4)`
(ii) `C_(2)H_(2)`
(iii) `C_(6)H_(6)`
(iv) `C_(2)H_(6)`

Options

A. `BltCltAltD`
B. `CltBltAltD`
C. `BltAltCltD`
D. `DltCltAltB`

Answer

C

Explanation

`C_(6)H_(6)(C )` have -C-C and -C`==`C- bonds so benzene has an average bond length of two bonds, i.e 1.40 Å.
`C_(2)H_(4)` (A) has bond ,having bond length 1.34 Å.
`C_(2)H_(4)` (B) has`-C-=C` - bond,having bond length 1.21 Å
`C_(2)H_(6)` (D) having bond,having bond length 1.54 Å `therefore` Increasing order of bond length is
`BltAltCltD`