47. Which of the following changes will alter the value of K? A. Pressure of HBr(g) B. Acatalyst added C. The temperature is decreased D. The volume of the container is doubled. 48. The number of HBrtg) and 0,(g) that must collide to form the transition state is refered to as? A. The order of the reaclion B. The molecularity of the reaction C. The rate determining step D. Collision theory.
47. Which of the following changes will alter the value of K? A. Pressure of HBr(g) B. Acatalyst added C. The temperature is decreased D. The volume of the container is doubled. 48. The number of HBrtg) and 0,(g) that must collide to form the transition state is refered to as? A. The order of the reaclion B. The molecularity of the reaction C. The rate determining step D. Collision theory.
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Chapter1: Chemical Foundations
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Answer Q47 & 48
![43
47. Which of the following changes will alter
the value of K?
A. Piessure of HBr(g)
B. A catalyst added
C. The temperature is decreased
D. The volume of the container is
doubled.
Fraction
of
molecule
with E
48.
The number of HBr(g) and O,(g) that must
collide to form the transition state is
refered to as?
A. The order of the reaction
B. The molecularity of the reaction
C. The rate determining step
D. Collision theory.
Energi
What faclor of the reaction must be altered to
obtain curve P instead of curve N?
A) pressure
B) No, of molecules
C) concentration
D) temperature
Questions 49 and 50.
Thhe rate of the reaction A
spect to A is 1.6x10 moldm 's' when the
concentration of a is 0.35moldm If the
with re-
reaction is second order,
49. the rate constant will be
A. 1.306
C. 0.032
Questions 44 -48
This group of questions deals with a situation.
The situation is followed by a set of questions.
Select the best answers for each question.
The rate of the reaction 4HBr + 0,(g) -→
2H O(g) + 2Br (g) was studied at a fixed
temperature and the following data were
obtained
B.
0.1306
D.
0.040
50
A. mol dm's
C. moldm's
The units of rate constant is
B.
D.
moldm's1
mot dm's'
Experiment HBr(g) [0,(9) Initial rate in
moldm 's
1.23 x 10
3.69 x 10
1.845 x 10
51. In a reaction, the concentralion of a
reaclant B is changed from 0.2 to 0.4 unis.
and the initial rate of reaction is found to
change from 32 x 10 to 6.4 x 10 all other
concentrations remained unchanged. The
order of the reaction with respect to
reactant B is
A. O
number
0.01
0.03
0.03
0.10
0.10
0.05
2.
3.
44. The rate of this reaction can be monitored
by
B. 1
C. 2
D. 3
B. Volumetry
Titrimetry
C. Conductivity D. Colorimetry
A.
52. Iron(I1) ions are used to speed up the
reaction rate between KI(aq) and S,0,
(ag). iron is said to be
A.
45. The rate expression for this reaction is
A. Rate = K[HBR0]
B. Pate = K[HBr][O.F
C. Rate = K[HBr][0}
D. Rate = K[HBrO]
a catalysis
B.
an autocatalyst
C. a heterogeous catalyst
D. a homogeneous catalyst.
53. The decoposition of H,O, follows a first
order reaction with a rate constant of 4.10
x 10 min at 50°C. If the initial [H,O] is
0.20 moldm, the HO.] after 10 minutes is
A. 1.33
C. 0.0133
46. The units of the rate constant will be
A. Moldm 's
C. Mol dm's
B. Mol'dms
D. Mol 'dm's
B.
0.133
D.
1.33 x 10
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Transcribed Image Text:43
47. Which of the following changes will alter
the value of K?
A. Piessure of HBr(g)
B. A catalyst added
C. The temperature is decreased
D. The volume of the container is
doubled.
Fraction
of
molecule
with E
48.
The number of HBr(g) and O,(g) that must
collide to form the transition state is
refered to as?
A. The order of the reaction
B. The molecularity of the reaction
C. The rate determining step
D. Collision theory.
Energi
What faclor of the reaction must be altered to
obtain curve P instead of curve N?
A) pressure
B) No, of molecules
C) concentration
D) temperature
Questions 49 and 50.
Thhe rate of the reaction A
spect to A is 1.6x10 moldm 's' when the
concentration of a is 0.35moldm If the
with re-
reaction is second order,
49. the rate constant will be
A. 1.306
C. 0.032
Questions 44 -48
This group of questions deals with a situation.
The situation is followed by a set of questions.
Select the best answers for each question.
The rate of the reaction 4HBr + 0,(g) -→
2H O(g) + 2Br (g) was studied at a fixed
temperature and the following data were
obtained
B.
0.1306
D.
0.040
50
A. mol dm's
C. moldm's
The units of rate constant is
B.
D.
moldm's1
mot dm's'
Experiment HBr(g) [0,(9) Initial rate in
moldm 's
1.23 x 10
3.69 x 10
1.845 x 10
51. In a reaction, the concentralion of a
reaclant B is changed from 0.2 to 0.4 unis.
and the initial rate of reaction is found to
change from 32 x 10 to 6.4 x 10 all other
concentrations remained unchanged. The
order of the reaction with respect to
reactant B is
A. O
number
0.01
0.03
0.03
0.10
0.10
0.05
2.
3.
44. The rate of this reaction can be monitored
by
B. 1
C. 2
D. 3
B. Volumetry
Titrimetry
C. Conductivity D. Colorimetry
A.
52. Iron(I1) ions are used to speed up the
reaction rate between KI(aq) and S,0,
(ag). iron is said to be
A.
45. The rate expression for this reaction is
A. Rate = K[HBR0]
B. Pate = K[HBr][O.F
C. Rate = K[HBr][0}
D. Rate = K[HBrO]
a catalysis
B.
an autocatalyst
C. a heterogeous catalyst
D. a homogeneous catalyst.
53. The decoposition of H,O, follows a first
order reaction with a rate constant of 4.10
x 10 min at 50°C. If the initial [H,O] is
0.20 moldm, the HO.] after 10 minutes is
A. 1.33
C. 0.0133
46. The units of the rate constant will be
A. Moldm 's
C. Mol dm's
B. Mol'dms
D. Mol 'dm's
B.
0.133
D.
1.33 x 10
164
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