Which of the following is NOT correct test for the named organic compound in each case?

A.

Butanoic acid solution gives effervescence with Na2CO3 solution

B.

Glucose when reacted with Na2CrO4 at 0°C will show immediate discharge of colour

C.

When but-2-ene is reacted with dilute solution of KMnO4 the purple colour of KMnO is discharged readily even room temperature

D.

When butan-2-ol is boiled with butanoic acid with a drop of concentrated H2SO4 a sweet smelling liquid is produced

Correct answer is B

No explanation has been provided for this answer.