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3rd Q Review # 4
Test Description: CHEM
Instructions: Answer all questions to get your test result.
1) Compounds can be broken down
A
chemically
B
not at all
C
physically
2) Methane does not dissolve in water , based on this methane is
A
non polar
B
polar
3) Which of the following compound has a symmetrical distribution of charge
A
F2
B
PCl3
C
NH3
D
H20
4) Which has a sea of moving (mobile) electrons
A
CH4
B
NaCl
C
NH3
D
Ag
5) what is the maximum # of electrons that can fit in the third electron shell?
A
6
B
10
C
8
D
18
6) A substance that produces H+ in solution is
A
an arrhenius acid
B
an arrhenius base
C
an isotope
D
a gas
7) An alternative acid base theory stats
A
acids donate OH-
B
acid accept H+
C
bases accept H+
D
bases accept OH-
8) What is the electronegativity difference of a H-0 bond ?
A
.6
B
1
C
.5
D
1.2
9) A joule is a unit of
A
energy
B
length
C
pressure
D
volume
Helpful Hint
C C concentration are constant
10) When a reversible reaction is at equilibrium, the concentration of products and the concentration of reactants must be
A
increasing
B
decreasing
C
equal
D
constant
11) When a catalyst is added
A
it creates an alternative pathway that lowers activation energy
B
it creates an alternative pathway that raises activation energy
12) Which measure concentration ?
A
ATM
B
L
C
PPM
D
Grams
Helpful Hint
both snoop and tupac got subway B, Si, As, Te , Ge, Sb
13) which is a metalloid ?
A
Si
B
S
C
Pb
D
C
14) Which is NOT a metalloid ?
A
Po
B
Ge
C
Te
D
Sb
Helpful Hint
M=MOL/L
15) What is the concentration of an aqueous solution that contains 1.5 moles of NaCl in 500 milliliters of this solution?
A
3
B
1
C
2
D
1.5
16) according to table M , what color is methyl orange in a pH of 11
A
orange
B
green
C
yellow
D
blue
17) According to table M , what color is thymol blue in a pH of 10
A
red
B
blue
C
yellow
D
green
18) which element is a gas at STP?
A
P
B
Cl
C
S
D
Cu
19) H + H = H2 What occurs during this reaction?
A
A bond is formed and energy is released
B
A bond is broken and energy is absorbed.
C
A bond is broken and energy is released.
D
A bond is formed and energy is absorbed.
20) What heat formula do you use for the key word MELT
A
Q=MHv
B
Q=MHf
C
Q=MCAT
*select an answer for all questions
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