Question # 1 (Multiple Choice) Pigments in various inks are separated during paper chromatography due to

A) solubility in chosen solvent and adhesion to paper
B) nature of solvent used and atmospheric pressure
C) depth of paper in the solvent cup
D) attraction of the pigments to the ink in the paper

Question # 2 (Multiple Answer) Choose correct matches for scientist-discovery:

A) Roentgen - X-Rays
B) Becquerel - electrons
C) Curies - radioactivity
D) Thomson - neutrons
E) Rutherford - structure of atom

Question # 3 (Multiple Answer) The process involving carbon-14 radioactive dating includes which of the following:

A) nitrogen undergoing electron capture to form carbon-14
B) half-life of carbon-14 is about 50 000 years
C) 13 % carbon-14 in all living creatures undergoing respiration
D) carbon-14 undergoes alpha decay in its return to nitrogen-14

Question # 4 (Multiple Answer) Which of the following was a major safety concern during the Cavendish hydrogen jet experiment?

A) proper procedure for mixing acid and water
B) extending thistle tube to bottom of gas generator
C) removing the gas generator out of the room ASAP
D) wearing appropriate safety clothing and equipment
E) mixing water with zinc sulfate and copper (II) sulfate

Question # 5 (Multiple Choice) The greatest amount of radioactivity a normal human receives in the course of a year us usually due to (excluding any medicl/dental X-rays):

A) cosmic radiation from space
B) the land, food, and water
C) smoke detectors in the home
D) living close to nuclear power plants
E) watching TV too many hours a day

Question # 6 (Multiple Answer) Which of the following particles are quark-based?

A) protons
B) photons
C) electrons
D) neutrons
E) alpha particles

Question # 7 (Multiple Choice) An advantage in using an amalgam for dental fillings might be

A) amalgam mixtures are the same color as tooth enamel
B) toxic properties of mercury are enhanced in formation of alloy
C) low melting point of mercury based mixture
D) the alcohol mixture will kill germs present in the tooth cavity

Question # 8 (Multiple Answer) Entropy can be demonstrated by which of the following examples:

A) adding a drop of food coloring to warm water and watching it disperse
B) allowing chairs in a classroom to become more disorganized over time
C) gasoline burning cars using 20-40 % of the efficiency of the fuel
D) collecting and putting in order all your CDs
E) trash dumps being filled up and buried

Question # 9 (Multiple Choice) Paracelsus was known as:

A) the last of the medical anthropologists
B) the first of the physical astronomers
C) the last of the Philosopher's Stone chasers
D) alchemist that bridged the gap between alchemy and chemistry

Question # 10 (Multiple Answer) Being able to separate a micro-mixture of sand, salt, iron filings, and talc requires which of the following techniques:

A) filtration
B) evaporation
C) knowledge of solubility
D) density
E) magnetism

Question # 11 (Multiple Choice) If your partner in lab accidentally burns you with acid, the first thing both of you should do is

A) scream for teacher
B) flood room with water
C) drink large amounts of water
D) finish experiments
E) hold burned area under gentle stream of water

Question # 12 (Multiple Answer) Find the correct statement(s) concerning chemical reactivity:

A) nonmetals with fewer electrons in outer valence shell are most reactive due to smaller number of electrons to be given up
B) large metals are more reactive due to larger number of outer shell electrons (i.e., that which makes them larger)
C) nonmetals at the top of a family are more reactive due to small atomic radius (size)
D) large metals are more reactive due to distance between nucleus and valence electrons (outer s and p subshell electrons)

Question # 13 (Multiple Choice) The measurement tool used in class that allowed correct measurements to the hundreths place in length:

A) French curve
B) vernier caliper
C) centigram scales
D) buret
E) pipet

Question # 14 (Multiple Answer) Colloids, such as glurch and oobleck, demonstrate

A) particles stay in suspension
B) particles settling out of solution
C) clear and present dangers to all life on earth
D) both Newtonian and non-Newtonian characteristics

Question # 15 (Multiple Answer) The purpose of the Activity Series:

A) show which metal will replace another metal in a chemical reaction (in aqueous solution)
B) show which metals are more active than hydrogen (i.e., will react when placed in acid)
C) list elements in order of atomic radius
D) list elements with highest first ionization potential
E) show which elements have greatest potential to become ions

Question # 16 (Multiple Answer) Choose correct descriptions for properties of metals

A) high tensile strength
B) sonorous
C) good conductors of heat and electricity
D) non-ductile
E) non-malleable

Question # 17 (Multiple Answer) Sample of iron, found by early man, differed from other metals in that they were

A) found to have come to the earth in the form of meteorites
B) found in a pure state on the surface of the earth
C) found to contain about 15% tin
D) found to contain traces of nickel that prevented rusting