The loss of volatile elements in organic material, leaving only a thin dark film behind, is the
process of _______. Fill in the blank(s) with the appropriate word(s).
carbonization
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When do ordinary thunderstorms usually form?
A. just before sunrise B. around midnight C. late afternoon D. just after sunrise
Judge the following sentence according to the criteria given below. Deltas are immune from the effects of sea-level rise because deltas are headlands that build into the sea by the deposition of river sediment
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
Which of the following has the lowest boiling point?
A) heptane B) hexane C) octane D) nonane
A student wanted to use the branched groups, isobutyl, sec-butyl, and tert-butyl when naming alkenes, but was told not to. What is the correct IUPAC name for the compound the student called sec-butylethene?
A) 4-methyl-1-pentene B) 3-methyl-1-pentene C) 3,3-dimethyl-1-butene D) none of these