When N,N- is part of the IUPAC name of an amine which of the following is true?
A) The amine is a 1° amine.
B) The amine is a 2° amine.
C) The amine is a 3° amine.
D) The amine has more than one N atom.
C
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Which of the following affects about 83% of the earth's surface, excluding Antarctica?
A. The presence of cities B. Human activities in general C. Agricultural use D. Landfills and waste disposal E. Occupation by power plants
Pluto is the planet with the most ellipitcal orbit. Indicate whether the statement is true or false
Which statement does not describe an advantage of using conventional crude oil as an energy source?
A. high net energy yield B. efficient distribution system C. environmental costs included in market price D. ample supply for several decades E. low land disruption
Researchers in Switzerland have demonstrated that organic farming ________
A) presently has no market in Europe B) is only sustainable with pesticides and synthetic fertilizers C) suppresses the biodiversity of pollinating insects, especially bees D) increases the incidence of invasive species E) decreased organic soil losses while giving yields almost as high as conventional farming