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

Options

A. `C_(7)H_(9)O`
B. `C_(8)H_(12)O`
C. `C_(6)H_(11)O`
D. `C_(10)H_(17)O_(2)`

Answer

B

Explanation

Degree of unsaturation `=(sumn(v-2))/(2)+1`
n = no. of atoms of a particular type
v valency of the atom
`C_7 H_9O : DU =(7(4-2)+9(1-2)+1(2-2))/(2) + 1 = 3.5`
`C_8 H_(12) O : DU = (8(4-2)+12(1-2)+1(2-2))/(2) + 1 = 3`
`C_(6)H_(11)O : DU = (6(4-2)+11(1-2)+1(2-2))/(2) +1 = 1.5`
`C_(10)H_(17)O_(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.