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WorksheetsChemistry Regent - June 2014 Q11-20
Total questions: 10
Worksheet time: 11mins
Name
Class
Date
1.
The greatest amount of energy released per gram of reactants occurs during a
a)
redox reaction
b)
fission reaction
c)
substitution reaction
d)
neutralization reaction
2.
Which element has atoms with the strongest attraction for electrons in a chemical bond?
a)
chlorine
b)
nitrogen
c)
fluorine
d)
oxygen
3.
Compared to the physical and chemical properties of the compound NO2, the compound N2O has
a)
different properties and different chemical properties
b)
different physical properties and the same chemical properties
c)
the same physical properties and different chemical properties
d)
the same physical properties and the same chemical properties
4.
Which phrase describes a molecule of CH4, in term of molecular polarity and distribution of charge?
a)
polar with a asymmetrical distribution of charge
b)
polar with a symmetrical distribution of charge
c)
nonpolar with an asymmetrical distribution of charge
d)
nonpolar with a symmetrical distribution of charge.
5.
Which sample of copper has atoms with the lowest average kinetic energy?
a)
10. g at 45 degrees C
b)
20. g at 35 degrees C
c)
30. g at 25 degrees C
d)
40. g at 15 degrees C
6.
Which change results in the formation of different substances?
a)
burning of propane
b)
melting of NaCl(s)
c)
deposition of CO2(g)
d)
solidification of water
7.
Which substance can not be broken down by a chemical change?
a)
ammonia
b)
ethanol
c)
propanal
d)
zirconium
8.
According to Table I, which equation represents a change resulting in the greatest quantity of energy released?
a)
2C(s) + 3H2(g) → C2H6(g)
b)
2C(s) + 2H2(g) → C2H4(g)
c)
N2(s) + 3H2(g) → 2NH3(g)
d)
N2(s) + O2(g) → 2NO(g)
9.
Which element is a liquid at STP?
a)
bromine
b)
cesium
c)
francium
d)
iodine
10.
Which statement describes a reversible reaction at equilibrium?
a)
The activation energy of the forward reaction must equal the activation energy of the reverse reaction
b)
The rate of the forward reaction must equal the rate of the reverse reaction
c)
The concentration of the reactants must equal the concentration of the products
d)
The potential energy of the reactants must equal the potential energy of the products
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