Time (min) 90. When 1-bromopropane is hydrolysed by Reactinljmoil boiling with aqueous ethanol, the rate expression for the reaction is found to be Rato = K[C,H,BrOH]. Which of the following etatement(s) is (are) consisterit with this observation? 1. the unit lor the rate constant is moldm. 2. the reacuon is first order with respect 94. Which reactic 1. Th 2. TI no to hydroxide ions. 3. the slow step of the reaction is likely to involve the halogenoalkane and lhe hydroxide ions. re 95. Given A+ 2B 91. The rate of a chemicel reaction: 1. can be influenced by the presence of a catalyst. 2. is the rate of change of concentration of a reactant per unit time. 3. is the rate of change of concentration of a product per unit time. Expt No. 92. What is meant by a first order reaction? 1 One whose rete is directly proportional to the concentration of a reactant. 2 One whose half-ite is independent of its initial concentration. 3. One whose graph of concentration against time gives a straight line through the origin. No ofl of aolecule with E Which correct 1. the 2. the 3. the Energy 167 3. 234
Time (min) 90. When 1-bromopropane is hydrolysed by Reactinljmoil boiling with aqueous ethanol, the rate expression for the reaction is found to be Rato = K[C,H,BrOH]. Which of the following etatement(s) is (are) consisterit with this observation? 1. the unit lor the rate constant is moldm. 2. the reacuon is first order with respect 94. Which reactic 1. Th 2. TI no to hydroxide ions. 3. the slow step of the reaction is likely to involve the halogenoalkane and lhe hydroxide ions. re 95. Given A+ 2B 91. The rate of a chemicel reaction: 1. can be influenced by the presence of a catalyst. 2. is the rate of change of concentration of a reactant per unit time. 3. is the rate of change of concentration of a product per unit time. Expt No. 92. What is meant by a first order reaction? 1 One whose rete is directly proportional to the concentration of a reactant. 2 One whose half-ite is independent of its initial concentration. 3. One whose graph of concentration against time gives a straight line through the origin. No ofl of aolecule with E Which correct 1. the 2. the 3. the Energy 167 3. 234
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Answer Q 90 , 91 & 92
![TYPE THREE QUESTIONS
The graph albove gives the distribution of energy
of molecule at two temperatures T, and T (T>T).
Questions 90- 108
DIRECTIONS: For each of the questions befow,
ONE or MORE of the responses is (are)
corroct Decile which of the responses is
(are) correct. Then choose
1,2 and 3 are all correct
93
Which of the following statement(s) about
the graph is tare) correct?
1 Fewer molecules acquire Ea al T, and
T, because at T, the curve flattens
All collisions at T, are fruitiul
A.
B f1 and 2 only are correct
C. I 2 and 3 oniy are correct
D. IF 3 only is correct
3.
The number of molecules witi energy
E2 Ea roughly cdoubles that for , at 1.
1.2.3 are 1,2 only
correct
DIRECTIONS SUMMARISED
C
2,3 only
are correct are correctlis ccrrect
The data on the table below shows the change in
concentration of a reactant wilh time in a certain
reaction.
3 only
Time (min)
5 10
Reactantjmoidm 0 53 026 D 17 0.12 0.10 0.08
15 20
24
90. When 1-bromopropane is hydrolysed by
boiling with aqueous ethanol, the rate
expression for the reaction is found to be
Rate = K[C,H,Br]OH].
Which of the following statement(s) is (are)
consisterit with this observalion?
1. the unil tor the rate constant is moldm.
2. the reacuon is first order with respect
to hydroxide ions.
3.
94. Which of the statement(s) suggest that the
reaction is NOT first-order?
The half-life for the reaction is constant.
The expression freactants) a should
not hold.
1.
2.
3. When the [reaclant] is halved, the
reection time is not doubled.
the slow step of the reaction is likely to
invalve the halogenoalkane and lhe
hydroxide ions.
95. Given the following data for the reaction
A + 2B C
91. The rate of a chemical reaction:
can be Influenced by the presence of a
catalyst.
2. is the rate of change of concentration
of a reactant per unit time
is the rate of change of concentration
of a product per unit time.
1.
Expt No.
Initial (A Initial [B]
Initial
rate of
formation
0.10
0.20
0.10
0.001
0.004
0.001
0.009
0.10
3
0.20
0.10
4
0.20
92. What is meant by a first order reaction?
1 One whose rete is directly proportional
to the concentration of a reactanl.
2 One whose half-lite is independent of
0.30
Which of the foliowing statement(s) islare
correct?
1.
its initial concentration.
3. One whose grapn of concentration
against time gives a straight line
through the origin.
the partial order with respect to A is 1.
2. the partial order with respect to B is 2.
3. the overal order of the reaction is 2.
No of
of
tinolecule
with E
Enero 167](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5a34b30f-b24b-4f7d-99ce-077847d6f8ed%2Fa2dd999c-1b9f-4d80-8944-9aa7fe52c94a%2Fp4ltg6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:TYPE THREE QUESTIONS
The graph albove gives the distribution of energy
of molecule at two temperatures T, and T (T>T).
Questions 90- 108
DIRECTIONS: For each of the questions befow,
ONE or MORE of the responses is (are)
corroct Decile which of the responses is
(are) correct. Then choose
1,2 and 3 are all correct
93
Which of the following statement(s) about
the graph is tare) correct?
1 Fewer molecules acquire Ea al T, and
T, because at T, the curve flattens
All collisions at T, are fruitiul
A.
B f1 and 2 only are correct
C. I 2 and 3 oniy are correct
D. IF 3 only is correct
3.
The number of molecules witi energy
E2 Ea roughly cdoubles that for , at 1.
1.2.3 are 1,2 only
correct
DIRECTIONS SUMMARISED
C
2,3 only
are correct are correctlis ccrrect
The data on the table below shows the change in
concentration of a reactant wilh time in a certain
reaction.
3 only
Time (min)
5 10
Reactantjmoidm 0 53 026 D 17 0.12 0.10 0.08
15 20
24
90. When 1-bromopropane is hydrolysed by
boiling with aqueous ethanol, the rate
expression for the reaction is found to be
Rate = K[C,H,Br]OH].
Which of the following statement(s) is (are)
consisterit with this observalion?
1. the unil tor the rate constant is moldm.
2. the reacuon is first order with respect
to hydroxide ions.
3.
94. Which of the statement(s) suggest that the
reaction is NOT first-order?
The half-life for the reaction is constant.
The expression freactants) a should
not hold.
1.
2.
3. When the [reaclant] is halved, the
reection time is not doubled.
the slow step of the reaction is likely to
invalve the halogenoalkane and lhe
hydroxide ions.
95. Given the following data for the reaction
A + 2B C
91. The rate of a chemical reaction:
can be Influenced by the presence of a
catalyst.
2. is the rate of change of concentration
of a reactant per unit time
is the rate of change of concentration
of a product per unit time.
1.
Expt No.
Initial (A Initial [B]
Initial
rate of
formation
0.10
0.20
0.10
0.001
0.004
0.001
0.009
0.10
3
0.20
0.10
4
0.20
92. What is meant by a first order reaction?
1 One whose rete is directly proportional
to the concentration of a reactanl.
2 One whose half-lite is independent of
0.30
Which of the foliowing statement(s) islare
correct?
1.
its initial concentration.
3. One whose grapn of concentration
against time gives a straight line
through the origin.
the partial order with respect to A is 1.
2. the partial order with respect to B is 2.
3. the overal order of the reaction is 2.
No of
of
tinolecule
with E
Enero 167
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