Question

Double bonded compounds forms 1:2 Diols with………. *



1.Dil. H2SO4

2.Cold aq. KMnO4

3.BH3 and H2O2

4.All of these​

Answer 1

Answer:

2nd option

Explanation:

Answer 2

Double bonded compounds forms 1:2 Diols with : 2.Cold aq. KMnO4.

• Out of all options we can say that the reagent is used for the formation of 1,2 Diols from double bonded compounds like alkene is Cold aq. KMnO4.

• As, in the first one i.e. Dil.H2SO4 it will not form the diol but it form the alcohol. Same with the BH3 and H2O2 reagent.

• But in the case of cold aq. KMnO4 it forms the diol.

• Let's see the example, in the case of Alkene like ethene ( double bonded compounds ) . When we react it with cold aq. KMnO4 it will form the ethane -1,2-diol (ethylene glycol).

• CH2=CH2 + cold aq. KMnO4 —> CH2OHCH2OH