How many monochloro constitutional isomers would the reaction of 2-methylbutane with chlorine in the presence of light produce?

There are 4 monochloro isomers possible

Explanation:

The monochlorination of 2-methyl butane has 4 monochloro isomers, with different grade of abundance.

33 % 2-chloro-3-methylbutane

30 % 1-chloro-2-methylbutane

22 % 2-chloro-2-methylbutane

15 % 1-chloro-3-methylbutane.

33 % 2-chloro-3-methylbutane  is the most stable; 15 % 1-chloro-3-methylbutane is the less stable.

Of those 4 monochloro isomers, there are two chiral compounds  possible

⇒ 2-chloro-2-methylbutane

⇒ 2-chloro-3-methylbutane.

the correct answer is:

a. formation of precipitation

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.