Which of the following molecules is most likely to show a dipole-dipole interaction?
A. CH4
B. H-C 
C-H
C. CO2
D. H2S
E. none of the above
Answer: D
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What happens when plate tectonics causes two continents to collide at a convergent plate boundary?
a) The older continent is subducted into the mantle. b) The denser continent is subducted into the mantle. c) Neither continent will subduct, so they crumple and form mountain ranges. d) The convergent boundary turns into a divergent boundary. e) A supercontinent is formed.
Species that are found only in specific environments or have restricted localities are said to be ________
A) endemic B) diverse C) structurally complex D) evenness E) rich
Which of the following elements is found in all three of the nerve gases parathion, sarin and soman?
A) chlorine B) nitrogen C) phosphorous D) sulfur
Which of the following occurs as a result of compression?
A) elongation B) strain C) shortening D) strength