Answer:
Reacts with salt to from an acid
To separate off different products in order of their boiling points. You do it by a process of heating and cooling in a horizontal condenser usually.
Co2 is oxygen because that what you took to ask ppl for
The correct answer from the choices given is the third option. Covalent compounds have low boiling points. Also, their melting points are low. Covalent bonds have relatively low attractions which results to these properties. The bonds are easily broken by taking energy or adding energy.
Just breaking stuff so yea that’s it