Question

If an externality is present resulting in market failure then

Answer 1

Then the private benefit from consumption will will not be the same as the social benefit from consumption.

An externality is the impact of a buy or choice on a man group who did not have a choice in the occasion and whose interests were not considered. Externalities, at that point, are overflow impacts that fall on parties not generally engaged with a market as a maker or a buyer of a product or service. Externalities can be negative or positive, and externalities can come about because of either the production or the utilization of a good, or both.