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MDCAT Chemistry Chapter 6 Chemical Equilibrium Online Test MCQs With Answers
Question # 1
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 # 2
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 # 3
In which of the following techniques rate of reaction is directly related with number ofions
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Spectrometry
Dilatometric method
Conductometric method
Refractometric method
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Question # 4
Unit of the rate constant depends upon the
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Molecularity of reaction
Order of reaction
Concentration terms
Number of reactants
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Question # 5
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 # 6
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 # 7
The rate of reaction for a reaction is 30 mol dm-3sec-1 if the product of concentration of 10.reactant is unity the specific rate constant is
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25
2.5
30
15
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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
When does average rate become equal to instantaneous rate of reaction
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At the start of reaction
time interval is zero
at the end of reactior
time interval approaches zero
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Question # 10
Doubling the pressure in a liquid phase reaction
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Will double the rex
Will increase the rex
Will decrease the rex
Will not alter the concentration of reactant
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Question # 11
In dilatometric method is directly proportional to extent of reaction
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Change in concentration
Change in pressure
Chang in volume
Change in temperature
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Question # 12
Which of the following statement about the order of reaction is true?
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The order of reaction can only be determined by experiment
a second order reaction is also bimolecular
The order of reaction is always non-zero
The order of reaction increases with increasing temperature
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Question # 13
For reaction of methane and chlorine light is not available then
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Reaction will take place rapidly
No Reaction take place
Reaction occurs at double the rate
May all cases occur
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Question # 14
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 # 15
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 # 16
The conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of
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2
4
1/2
1/4
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Question # 17
Rusting of iron is the example of
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Fast
Slow
moderate
depends upon conditions
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Question # 18
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 # 19
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 # 20
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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