Which of the following is an incorrect statement?

Options

A. a.The oxidation of `1,2`-ethanediol with `HIO_(4)` gives formaldehyde.
B. b.`1^(@)` Alcohol turns `K_(2)Cr_(2)O_(7)//H^(o+)` solution green
C. c.`t`-Butyl alochol is converted to isobutene on heating with `Cu`.
D. d.`CH_(3)OH` is also called denatured spirit.

Answer

D

Explanation

a.
b.`K_(2)Cr_(2)O_(7)` in acid has a bright orange colour when it oxidies an alcohol, it is reduced to blue-green to the formation of `Cr^(3+)`.
`CH_(3)underset(("Orange"))(CH_(2)OH)+Cr_(2)O_(7)^(2-) rarr underset(("Blue-green"))(CH_(3)COOH)+2Cr^(3+)`
c.
d. The ethyl alcohol `(C_(2)H_(5)OH)` is denatured by the addition of poisonous substances such as `CH_(3)OH` or acetone or pyridine or `CuSO_(4)`. This is called methylated spirit or denatured spirit.
So, the statement `(d)` is incorrect.