Which of the following substances is most likely to be a liquid at room temperature? fluoromethane, ch3f hydrogen cyanide, hcn formaldehyde, h2co hydrogen peroxide, h2o2 hydrogen sulfide, h2s only 1 right answer

The answer is: hydrogen peroxide, H2O2.

H₂O₂(hydrogen peroxide) is pale blue, clear, inorganic liquid.

It is liquid because hydrogen bonds between molecules.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

Because of hydrogen bonds, hydrogen peroxide has higher melting and boiling temperatures than other molecules.

a electronegativity decreases beacuse the size of nucleus is bigger.