1.

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)

Answer»

`BltCltAltD`
`CltBltAltD`
`BltAltCltD`
`DltCltAltB`

SOLUTION :`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`


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