Not sure about any others but I believe 3 goes with B
An exothermic reaction is just where heat is released. So basically if heat is released during the reaction is is an exothermic one.
The molecules of hydrocarbons are non-polar because t<span>he electron pair is shared almost equally in all the bonds.
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Hydrocarbon molecules are composed of a carbon with hydrogen. When it comes to electronegativity, not one of these elements form polarity. When you have a huge difference in electronegativity, O-H, then polarity is created.Both elements are too close in their electronegativity, thus,<span> share electrons equally.</span>
