Which stable molecule would probably not exist?
a. ch3oh
b. vh2o
c. ch3o
d. c2h2
e. c3h4

Option C= CH₃O

Explanation:

CH₃O would not exist as a stable molecules because,

The in this compound oxygen is not stable.

In order to stable the oxygen carbon should form the double bond with oxygen. While the valency of carbon is four. It already form three bonds with three hydrogen atoms in this compound.

There is one electron left to form the bond with oxygen. So, there are not enough electrons which could bonded with oxygen and form stable compound.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.