Schiff's reagent test is a qualitative test to detect aldehydes, giving a pink/magenta color due to the formation of a complex.
Schiff's reagent
Step 1: Schiff’s reagent is used to distinguish between aldehydes and ketones. Aldehydes react with Schiff’s reagent to give a pink color, whereas ketones do not react. Since acetaldehyde is an aldehyde and acetone is a ketone, Schiff’s reagent can differentiate between them
Ethanal to But-2-enal
(b) Order of the differential equation: $ 5x^3 \frac{d^3y}{dx^3} - 3\left(\frac{dy}{dx}\right)^2 + \left(\frac{d^2y}{dx^2}\right)^4 + y = 0 $