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