Question

Baeyer’s reagent is?
A.Alkaline potassium permanganate
B.Acidified potassium permanganate
C.Neutral potassium permanganate
D.Alkaline potassium manganate

Answer 1

Hint:You should know that it is a great oxidizing agent. It is also used to differentiate between saturated and unsaturated hydrocarbons. Now try to recall the Baeyer’s test and try to figure it out by yourself.

Complete step by step answer:
-On a very general basis, Baeyer’s test is a laboratory test to identify the presence of double bonds in a given unsaturated compound.
-Baeyer's test is basically a test for unsaturation. In this test addition of bromine is done to a double bond, which results in the rapid decolourization of bromine water or bromine dissolved in carbon tetrachloride, is taken as a test for unsaturation.
Let us understand in detail.
Baeyer’s reagent is a very cold dilute solution of alkaline potassium permanganate. It is a purple or light violet color solution. Baeyer’s reagent is a strong oxidizing reagent which is used to identify the presence of double or triple bonds in a hydrocarbon. Thus it indicates the unsaturation of hydrocarbon compounds. For example, when purple colour reagent is added to ethylene, it obtains a colorless solution of ethane-1,2-diol.

Therefore, Baeyer’s reagent is alkaline potassium permanganate. Hence, option A is the required answer.


Note:
 Generally, when potassium permanganate is applied to your skin, it kills germs by releasing oxygen when it meets compounds in your skin. It also acts as an astringent, which is a drying agent.