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WorksheetsChemistry Regent - Jan 2017 Q41-50
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Which temperature represents the highest average kinetic energy of the particles in a sample of matter?
a)
298 K
b)
267 K
c)
27⁰C
d)
12⁰C
2.
Which change in the H ion concentration of an aqueous solution represents a decrease of one unit on the pH scale?
a)
a tenfold increase
b)
a tenfold decrease
c)
a hundredfold increase
d)
a hundredfold decrease
3.
Which particle diagram represents a mixture of three substances?
a)
1
b)
2
c)
3
d)
4
4.
Given the equation representing a system at equilibrium:
PCl5(g) ⇌ PCl3(g) + Cl2(g)
Which statement describes this system?
PCl5(g) ⇌ PCl3(g) + Cl2(g)
Which statement describes this system?
a)
The concentration of PCl5(g) is increasing.
b)
The concentration of PCl5(g) is decreasing.
c)
The concentrations of PCl5(g) and PCl3(g) are equal.
d)
The concentrations of PCl5(g) and PCl3(g) are constant.
5.
What is the IUPAC name of this compound?
a)
2-chloroheptane
b)
6-chloroheptane
c)
2,2-dichloroheptane
d)
6,6-dichloroheptane
6.
Given the equation representing a reaction:
Sn4+(aq) + 2e- → Sn2+(aq)
Which term best describes this reaction?
Sn4+(aq) + 2e- → Sn2+(aq)
Which term best describes this reaction?
a)
ionization
b)
neutralization
c)
oxidation
d)
reduction
7.
Which ionic equation represents a spontaneous reaction that can occur in a voltaic cell?
a)
Cu(s) + Zn(s) → Cu2+(aq) + Zn2+(aq)
b)
Cu(s) + Zn2+(aq) → Cu2+(aq) + Zn(s)
c)
Cu2+(aq) + Zn(s) → Cu(s) + Zn2+(aq)
d)
Cu2+(aq) + Zn2+(aq) → Cu(s) + Zn(s)
8.
Given the formulas representing two compounds at standard pressure. The compounds can be differentiated by their
a)
boiling points
b)
gram-formula masses
c)
number of hydrogen atoms
d)
percent compositions by mass of carbon
9.
The table below shows the atomic mass and natural abundance of the two naturally occurring isotopes of lithium.
Which numerical setup can be used to determine the atomic mass of naturally occurring lithium?
Which numerical setup can be used to determine the atomic mass of naturally occurring lithium?
a)
(7.6)(6.015u) + (92.4)(7.016u)
b)
(0.076)(6.015u) + (0.924)(7.016u)
c)
[(7.6)(6.015u) + (92.4)(7.016u)]/2
d)
[(0.076)(6.015u) + (0.924)(7.016u)]/2
10.
Given the equation representing a reaction at equilibrium:
H2S(aq) + CH3NH2(aq) ⇌ HS-(aq) + CH3NH3+ (aq)
According to one acid-base theory, the forward reaction is classified as an acid-base reaction because
H2S(aq) + CH3NH2(aq) ⇌ HS-(aq) + CH3NH3+ (aq)
According to one acid-base theory, the forward reaction is classified as an acid-base reaction because
a)
H2S is a H+ donor and CH3NH2 is a H+ acceptor
b)
CH3NH2 is a H+ donor and H2S is a H+ acceptor
c)
CH3NH3+ and HS- are both H+ donors
d)
CH3NH3+ and HS-are both H+ acceptors
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