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MDCAT Chemistry Chapter 6 Chemical Equilibrium Online Test MCQs With Answers
Question # 1
The number of atoms or molecules whose concentrations determines the rate of a chemical reaction is called the
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Molecularity of the reaction
specific activity of the reaction
Order of the reaction
rate constant of the reaction
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Question # 2
The number of reacting molecules whose concentration change during reaction is called
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Activated molecule
Rate of reaction
Order of reaction
half-life
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Question # 3
Consider gas is measure in bars then the units of rate of reaction is
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Mole dm-3 sec
Bars sec
Mole dm-3 sec-1
Bars sec-1
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Question # 4
For a chemical reaction in which one of the reactant also act as solvent, the order will be
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First order
Third order
Second order
pseudo-first order
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Question # 5
If the reaction "P+Q→R+S' is deseribed as being of zero order with respect to P, it means that
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P is catalyst in this reaction
P molecules do not possess sufficient energy to react
The concentration of P does not change during the reaction
The rate of reaction is independent of the concentration of P
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Question # 6
For a chemical reaction which can never be a fractional no
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order
molecularity
half-life
rate constant
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Question # 7
Rate of which reaction increases with temperature?
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Exothermic and endothermic reactions
Endothermic reactions
Exothermic reactions
None of these
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Question # 8
The slope of the graph is steepest at the beginning of reaction showing
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Rapid decrease in concentration of reactants
Rapid increase in concentration of reactants
Fast rate of reaction
All of the above
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Question # 9
Half-lives required to convert 100% reactant to produet for a first order reaction are
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10
1000
100
Infinity
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Question # 10
Amount of product formed increases with time, this statement is true for reactions-------with kinetics
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1s order
3rd order
zero order
Any order
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Question # 11
The study of which one of the followings guides to the mechanism of the reaction
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Order of reaction
Rate of reaction
Half-life period of reaction
Rate determining step
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Question # 12
If the energy of the activated complex lies close to energy of reactants, it means that reaction is
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Slow
Exothermic
Endothermic
Exothermic and fast
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Question # 13
The order of reaction provides valuable information about of reaction
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Condition
Concentration
Mechanism
Parameters
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Question # 14
For a chemical reaction to occur
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The vessel shall be open
Reacting molecules should have less energy than Ea at time of collision
Reacting molecules must be properly oriented and energy more than or equal to Ea
The reacting molecules must not collide with each other
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Question # 15
By increasing the concentration of reactants, the rate of reaction
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Decreases
Increases
Remains constant
Not predicted
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Question # 16
When the concentration of product is increased the instantaneous rate of reaction with reference to reactants will be
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Positive
Negative
the same
falling curve
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Question # 17
Reaction kinetics is important to discover the---under which reaction will proceed most economically:
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rate constant
Conditions
volume
equilibrium point
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Question # 18
If reactants are conductor of electricity, then method is used to measure the change in concentration of reaction
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Optical rotation
Refractrometric
Dilatometric
Electrical conductivity
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Question # 19
The concentration of product is increasing from 30 mole/dm3 to 40mol/dm3 in 0.5 sec then rate of reaction will be------moledm-3sec-1
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0
20
15
25
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Question # 20
The increase in reaction rate as a result of increase in temperature from 10K to 90K is
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512
256
400
112
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