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Online Tests
Chemistry Fsc Part 1 Chapter 11 Online Test MCQs With Answers
Question # 1
After 3 half life of a chemical reaction, amount of reactant un reactive will be.
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50%
25%
12.5%
6.25%
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Question # 2
The rate of reaction
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Increases as the reaction proceeds
Decreases as the reaction proceeds
Remains the same as the reaction proceeds
May decrease or increase as the reaction proceeds
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Question # 3
Half life period for 235 U is
92
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710 million years
810 milion years
720 million years
820 million years
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Question # 4
The unit of rate constant is the same as that of the rate of reaction is.
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First order reaction
Second order reaction
Zero order reaction
Third order reaction
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Question # 5
Which one of the following statements is incorrect.
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Enzymes are protein in nature
Enzymes are catalyst
Enzymes can catalyze any reaction
Urease is an enzyme
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Question # 6
The true representation for the units of rate constant K for the first order reaction
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sec
-1
mole dm
-3
s
mole dm
-3
s
-1
mole
-1
dm
+3
s
-1
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Question # 7
Which properties of liquid is measured by polarimeter
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Conductance
Refractive index
Optical activity
Change in volume
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Question # 8
The influence of temperature on reaction rate is predicated by
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Free energy change of reaction
Arrhenius equation
Van der weal's equation
Kinetic equation
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Question # 9
The unit of the rate constant is same as that of the rate of reaction in
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First order reaction
Second order reaction
Zero order reaction
Third order reaction
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Question # 10
The quantitative relationship between rate and concentration is given by.
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Law of mass action
Rate law
Both of these
Le Chatelier's principle
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Question # 11
Chemical reactivity of different substance is controlled by
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Atomic number
Electronic arrangement
Mass number
Number of isotope of reactant elements
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Question # 12
The power of which the concentration of a substance appears in the rate expression is known as
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order of reaction with respect to that substance
Rate of reaction
Order of reaction
Molecularity of reaction
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Question # 13
the rate of reaction when concentration of reactants are taken unity is called.
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Average rate
Instantaneous rate
Specific rate
Rate equation
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Question # 14
Unit of rate constant is the same as that of the rate of reaction in
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Zero order reaction
1st order reaction
2nd order reaction
3rd order reaction
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Question # 15
In zero order reaction the rate is independent of.
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Temperature of reaction
Concentration of reactants
Concentration of products
None of these
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Question # 16
Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the
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Collisions frequency
Activation energy
Average KE of molecules
Fraction of molecules with energies more than activation energy
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Question # 17
Which technique is used ot determine the absorption of radiations.
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Spectrometry
dilatometer method
Refractometric method
Optical rotation method
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