Of the following compounds , which contains a hydrogen atom that is likely to take part in hydrogen bonding?

Question

H2

or


CH4


or


BH3


or



CH3OH

Answer 1

In order for Hydrogen bonding to occur, the Hydrogen atom needs to be bonded with another, highly electronegative, atom (such as Oxygen, Fluorine, or Nitrogen).
The only molecule you have listed which meets this criteria is the ethanol (CH3OH).

The OH functional ground on the alcohol is polar and the Hydrogen atom develops a light positive charge. This slightly positively charged Hydrogen can be attracted to the other (slightly negative) end of other polar molecules for an increased intermolecular force of attraction.

CH3OH is the only one on the list that would experience Hydrogen bonding...the other 3 would not.

Answer 2

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