Which of the following best describes the role of a catalyst in a reaction? A)
A catalyst the activation energy required for a reaction to take place, B)
increases
a catalyst the rate at which reactants become products, C) a catalyst shifts
increases
the reaction
towards the reactants, D) a catalyst increases the amount of product
produced correct
answers
B)
Which of the following describes he effect of increasing the
concentration
reactants of the
in a reaction? A) the reaction rate will increase, B) the
reaction rate
decrease, will change in the reaction rate will depend on the
C) the
temperature
reaction, of the
D) the change in the reaction rate will depend on the pressure of
the reaction
correct answers
A)
Which of the following substances is reduced in the reaction shown
below?
3CO Fe2)3
- 2Fe +
+ 3CO2 A) Fe, B) O, C) CO, D) CO2 correct
answers A)
Which of the following equations is a balanced equation? A) 2KCLO3 - KCL
+ 3O2, -B)
KCLO3 KCL + 3O2, C) 2KCLO3 - 2KCL + 3O3, D) 6KCLO3 - 6KCL + 3O2
correct
answers
C)
Which of the following types of reactions is shown below? Pb (NO3)2 +
K2CrO4 +
PbCrO4 - 2KNO3 A) combustion, B) decomposition, C) double displacement,
D) single
replacement correct
answers C)
Which of the following terms describes a solution in which more
solvent canA)
dissolved? beunsaturated, B) saturated, C) supersaturated, D)
homogenous correct
answers
A)
In a carbonated soda, carbon dioxide is dissolved in water. Which of the
following terms
describes the water in this mixture? A) common ion, B) solvent, C) solute, D)
precipitant
correct answers
B)
Which of the following best describes a substance with a pH of 12? A) very
acidic, B)
slightly acidic, C) neutral, D) very basic correct
answers D)
Which of the following acids is a strong acid? A) HCLO, B) HBr, C) HF, D) HN3
correct
answers
B)
Which of the following terms describes the phase change from liquid
to solid? A) B) deposition, C) melting, D) freezing correct
evaporation,
answers D)
, Which of the following is likely to have the highest number of molecules?
A) 1 liter CO2,
gaseous of B) 1 liter of liquid CO2, C) 1 liter of solid CO2, D) 1 liter of a
mix of
and solid CO2 correct
gaseous
answers C)
Which of the following describes a physical change? A) water becomes ice,
B) batter
baked intoisa cake, C) a firecracker explodes, D) an acid is neutralized
with a base
correct answers
A)
Which of the following elements is most likely to form an ionic bond? A)
argon, B)C) copper, D) nitrogen correct
calcium,
answers B)
Which of the following bonds is the most polar? A) H-C, B) H-O, C) H-F, D) H-
N correct
answers
C)
Which of the following lists the elements carbon, fluorine, oxygen, and
nitrogen
of in order
increasing electro negativity? A) C<N<O<F, B) F<N<O<C, C)
F<O<N<C,
C<N<F<O correctD)
answers A)
Which of the following elements is an alkali metal? A) sodium, B) oxygen,
C) neon,
iron D) answers
correct
A)
What is the charge of an atom with 5 protons and 7 electron? A) 12, B) -12,
C) 2, D)answers
correct -2
D)
Which of the following subatomic particles are found in the nucleus of
an atom?
protons A) B) electrons only, C) protons and neutrons only, D) protons,
only,
electrons, correct
neutrons and
answers C)
Which of the following is the electron configuration for phosphorus? A) 1s2
2s2, 3p3,
3s2, 2p6, B) 1s2 2s2 2p6 3s2 3p6, C) 1s2 2p6 3s2 3p3, D) 1s2 2s2 2p2
3s2 3p3
4p3 4s2 answers
correct
A)
Which of the following polymers is created by joining amino acids? A) DNA,
B) lipid, C)
protein, D) carbohydrate correct
answers C)
Which of the following nucleotides is not found in DNA? A) adenine, B)
uracil, C) D) cytosine correct
thymine,
answers B)
Which of the following compounds is not created by joining
monosaccharides?
glycogen, B) starch,A)C) cellulose, D) guanine correct
answers D)
The Golgi apparatus is responsible for which of the following tasks?
A) protein B) intracellular and extracellular transport, storage and replication
synthesis,
of DNA, D) of ATP correct
production
answers B)