Chapter 4 Test Banks Exam Questions with Correct Answers
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Course
Organic Chemistry
Institution
Organic Chemistry
1) The element present in all organic molecules is ________.
A) hydrogen
B) oxygen
C) carbon
D) nitrogen - Answer-C) carbon
2) The complexity and variety of organic molecules is due to ________. A) the chemical versatility of carbon atoms
B) the variety of rare elements in organic molecule...
Chapter 4 Test Banks Exam Questions
with Correct Answers
1) The element present in all organic molecules is ________.
A) hydrogen
B) oxygen
C) carbon
D) nitrogen - Answer-C) carbon
2) The complexity and variety of organic molecules is due to ________. A) the chemical
versatility of carbon atoms
B) the variety of rare elements in organic molecules
C) the diverse bonding patterns of nitrogen
D) their interaction with water - Answer-A) the chemical versatility of carbon atoms
3) The experimental approach taken in current biological investigations presumes that
________.
A) simple organic compounds can be synthesized in the laboratory from inorganic
precursors, but complex organic compounds like carbohydrates and proteins can be
synthesized only by living organisms
B) a life force ultimately controls the activities of living organisms, and this life force
cannot be studied by physical or chemical methods
C) living organisms are composed of the same elements present in nonliving things,
plus a few special trace elements found only in living organisms or their products
D) living organisms can be understood in terms of the same physical and chemical laws
that can be used to explain all natural phenomena - Answer-D) living organisms can be
understood in terms of the same physical and chemical laws that can be used to explain
all natural phenomena
insoulable - Answer-incapable of being dissolved
4) Differences among organisms are caused by differences in the ________.
A) elemental composition from organism to organism
B) types and relative amounts of organic molecules synthesized by each organism
C) sizes of the organic molecules in each organism
D) types of inorganic compounds present in each organism - Answer-B) types and
relative amounts of organic molecules synthesized by each organism
nonpolar covalent - Answer-equal sharing of electrons
5) Stanley Miller's 1953 experiments supported the hypothesis that ________.
A) life on Earth arose from simple inorganic molecules
B) organic molecules can be synthesized abiotically under conditions that may have
existed on early Earth
, C) life on Earth arose from simple organic molecules, with energy from lightning and
volcanoes
D) the conditions on early Earth were conducive to the origin of life - Answer-B) organic
molecules can be synthesized abiotically under conditions that may have existed on
early Earth
hydrocarbon chain - Answer-
6) Miller's classic experiment demonstrated that a discharge of sparks through a mixture
of gases could result in the formation of a large variety of organic compounds. Miller did
not use ________ as one of the gases in his experiment.
A) methane
B) oxygen
C) water
D) ammonia - Answer-B) oxygen
7) Which of the following is true of carbon?
A) It forms only polar molecules.
B) It can form a maximum of three covalent bonds with other elements.
C) It is highly electronegative.
D) It can form both polar and nonpolar bonds. - Answer-D) It can form both polar and
nonpolar bonds.
8) The kind and number of bonds an atom can form depends on ________.
A) its atomic number
B) its electron configuration
C) its atomic mass
D) the number of particles in its nucleus - Answer-B) its electron configuration
9) Why is carbon so important in biology?
A) It is a common element on Earth.
B) It has very little electronegativity, making it a good electron donor.
C) It bonds to only a few other elements.
D) It can form a variety of carbon skeletons and host functional groups - Answer-D) It
can form a variety of carbon skeletons and host functional groups
10) How many electrons does one atom of carbon share to complete its valence shell?
A) 2
B) 3
C) 4
D) 8 - Answer-C) 4
11) A carbon atom has 6 electrons however, its valency is 4. This is because the carbon
atom ________.
A) donates its 2 electrons to another atom
B) shares its 2 electrons and bonds with another atom
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