question_answer

Which statement is correct regarding acid rain?

I. The term "acid rain" was coined in 1972 by Robert Angus Smith

II. Rainfall with pH less than 5.6 is called Acid rain.

III. Acid rain is caused by a chemical reaction that stall when sulfur dioxide  and nitrogen oxide (NOX) are released into the air

A)  I & II                           

B)  Only II

C)  II & III             

D)  All the above

Correct Answer: C

Solution :

Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). The term "acid rain" was coined in 1872 by Kobert Angus Smith, after a link was established between sulfur dioxide  emissions from the burning of coal in Manchester and acidification of nearby rainfall. Rainfall with pH less than 5.6 is called Acid rain.