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

Question 1 Report

Butanoic acid solution gives effervescence with Na2CO3 solution

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

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

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

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