(a) Hydrogen A gives monobromo derivative on reacting with excess HBr, 1 mole of the hydrocarbon require 6 moles of `O_(2)` for complete combustion , total number of carbon atoms present in hydrocarbon.
(b) Total number of possible isomers for A are.
(c) Hydrocarbon B gives red ppt. with `Cu_(2)Cl_(2) NH_(4)OH.` One mole of B require 8.5 moles of `O_(2)` for complete combustion. How many carbon atoms are present in the hydrocarbon? (d) Position of multiple bond in hydrocarbon B is .

Answer

A, D

Explanation

`(a) C_(n)H_(2n) +3/2n_(o_(2))`
`(3n)/(2)=6`
`3n=6xx2`
`C_(4)H_(8) " "n=4`
`(b) C-C-C=C" " 1`
`C-C=C-C" "2`
`C-underset(C)underset(|)C=C" "1`

`(C) C_(n)H_(2n-2)+((3n-1)/(2))O_(2)`
`(3n-1)/(2)=8.5xx2`
`3n=17+1`
`n=(18)/(3) =6`
`(d) C-C-C-C-C-=CH`