Baking soda and vinegar can be used to model a volcanic eruption in a science demonstration because they bubble violently when mixed. what can be concluded about mixing vinegar and baking soda?
a.
vinegar and baking soda react to form a new gaseous substance.
b.
vinegar boils when it comes in contact with baking soda.
c.
baking soda and vinegar make a uniform mixture.
d.
baking soda has a lower density than vinegar.

The correct answer is option A.

Explanation;

In a model of volcanic eruption, baking soda and vinegar is used to demonstrate the eruption of lava from the volcano.The bubbles generated when they are mixed together is due to chemical reaction in between the acetic acid and baking soda which leads to formation of new substance(s).

The gas released is carbon-dioxide gas.

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.