Compounds which contain a carbon-carbon double bond are classified as which of the following?
A) alkanes
B) alkenes
C) alkynes
D) arenes
B
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The principle of interposition in visual perception suggests that
A. An object with an incomplete outline appears behind another. B. An object with an incomplete outline appears at the same level as another. C. An object with an incomplete outline appears in front of another.
Which element would have chemical properties the most similar to chlorine (Cl)?
A) Br B) O C) Ar D) S E) Na
Children have the ability to synthesize each of the following amino acids, but for which of these are they unable to synthesize a sufficient amount for their needs?
A) histidine B) proline C) serine D) tyrosine
Which of the following statements is true regarding high or low pressure for a parcel of air at the surface?
A. higher temperature, lower density, warmer air rises, higher pressure at surface B. lower temperature, higher density, cold air rises, higher pressure at surface C. higher temperature, higher density, warmer air rises, lower pressure at surface D. lower temperature, higher density, cold air sinks, higher pressure at surface