Which of the following is an example of a secondary amine?
A) CH3NH2
B) CH3CH2NH2
C) CH3CH2CH2NH2
D) none of these
D
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In the natural world, where humans are not dominant, there is essentially no waste.
Answer the following statement true (T) or false (F)
Local land-use planning is usually more effective and economical than regional land-use planning.
Answer the following statement true (T) or false (F)
Supplies of potable freshwater are in short supply in many parts of the world because
A. of salt water intrusion. B. of pollution of lakes and rivers. C. irrigation uses all of the freshwater is many areas. D. None of these are correct.
The daily maximum temperature occurs at the time:
A) when outgoing radiation equals incoming. B) of maximum incoming radiation. C) when incoming radiation first exceeds outgoing radiation. D) near noon.