The following chart shows the production of an organization in various years from 2012 to 2016. Study the chart and answer the question.
What was the percentage increase in production from 2015 to 2016?
Three products, ____, ____ and ____ are produced in the chlor-alkali process.
Chlorine, Hydrogen, Na2CO3
Chlorine ,oxygen, Na2CO3
Hydrogen, Chlorine, NaOH
Oxygen, Hydrogen, NaOH