Question

Which one of the following formulae does not represent an organic compound?

• A. $C_{4} H_{10} O_{4}$
• B. $C_{4} H_{8} O_{4}$
• C. $C_{4} H_{7} ClO_{4}$
• D. $C_{4} H_{9} O_{4}$

Answer 1

Answer: (D)

$C_{4} H_{9} O_{4}$

Answer 2

$C _{4} H _{10} O _{4}$ is $C _{n} H _{2 n+2}$ type compound, ie with
unsaturation factor $0, C _{4} H _{8} O _{4}$ and $C _{4} H _{7} ClO _{4}$
are $C _{n} H _{2 n}$ (unsaturated) type compound, ie, have unsaturation factor 1 while $C _{4} H _{9} O _{4}$ is $C _{n} H _{2 n+1}$ type compound with unsaturation factor 0.5. Hence, $C _{4} H _{9} O _{4}$ does not represent an organic compound.

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