Given the three compounds (i) acetic acid (ii) 2-hydroxyethanal (iii) methyl formate Which are constitutional isomers of one another?
A) only (i) and (ii)
B) only (i) and (iii)
C) only (ii) and (iii)
D) They are all constitutional isomers of one another.
D
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Which is better for you: a drug that is a natural product or one that is synthetic?
A. Synthetic products are generally better for you because they lack impurities that could bring on side effects. B. Drugs extracted from natural products are invariably better for you. C. Drugs extracted from natural products are better except in the case where the synthetic drug is a replica of the drug found in nature. D. Whether a drug is good for you does not depend upon whether the drug occurs naturally or was synthesized in the laboratory.
Clay particles in soil are important in soil development because they ____
A)hold soil particles apart B)allow water and gases to enter soil C)retain water and supply nutrients D)allow the flow of groundwater E)they form horizon O in the soil profile
The east coast of the United States represents a passive margin along the North American plate.
Answer the following statement true (T) or false (F)
Life-cycle analysis is useful because energy and environmental hazards are associated with ________ of products.
A. Production, but not use B. Production and use, but not disposal C. Production, transport, use, and disposal D. Use as well as production E. Both transport and production