1.

Ammong the following the one which can exist in free state as a stable compound is:

Answer»

`C_7H_9O`
`C_8H_12O`
`C_6H_11O`
`C_10H_17O_2`

Solution :Degree of unsaturation = `(Sigman(v-2))/2+1`
n=no. of atoms of a particular type
v=valency of the atom
`C_7H_9O: DU=(7(4-2)+9(1-2)+1(2-2))/2 +1 =3.5`
`C_8H_12O : DU=(8(4-2)+12(1-2)+1(2-2))/2 +1=3`
`C_6H_11O :DU=(6(4-2)+1(1-2)+1(2-2))/2 +1=1.5`
`C_10H_17O_2 : DU=(10(4-2)+17(1-2)+2(2-2))/2 +1=2.5`
Molecules with fractional degree of unsaturation cannot exist with STABILITY


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