If both a methyl group and a hydroxyl group are attached to a benzene ring, which of the following is the preferred way to name the compound in the IUPAC system?
A) as a hydroxymethylbenzene
B) as a hydroxytoluene
C) as a methylphenol
D) all of these are equally acceptable
C
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The frictional force on a sliding object is 500 N. The applied force needed to maintain a constant velocity is
A. more than 500 N. B. 500 N. C. less than 500 N. D. none of the above
Explain, in your own words, why the degradation and loss of honeybee colonies are seen as an important example of biodiversity loss.
What will be an ideal response?
Which of the following is not an advantage that radio telescopes have over optical telescopes?
A) They are generally less expensive. B) They have better resolution. C) They can operate 24 hours a day. D) They are less affected by the conditions of the atmosphere. E) They can "see" through interstellar dust clouds.
Which greenhouse gas is found in great quantities in permafrost soils?
A. Nitrous oxide B. Ozone C. Methane D. Carbon dioxide