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MDCAT Chemistry Chapter 7 Reaction Kinetics Online Test MCQs With Answers
Question # 1
If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air will
Choose an answer
Remains constant
Increase
Decrease
Either increase or decrease
One Joule is equivalent to
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Question # 2
Enthalpy of a system can be calculated by which of following relationship
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q=ΔΕ
q=m×S×∆T
q=pv
q=m×v×∆T
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Question # 3
According to Hess's law, the enthalpy change for a reaction
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Depends on path
Independent of the path
The sum of ∆E and ∆H
None of these
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Question # 4
ΔH° represent the enthalpy change at
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0°C and 1 atm pressure
25°Cand 1atm
0K and I atm pressure
25°C and 2 atm pressure
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Question # 5
A system absorbs 100 kJ heat and performs 50 kJ work on the surroundings. The increase in internal energy of the system is
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50kJ
100 kJ
150kJ
5000 kJ
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Question # 6
For an endothermic reaction, enthalpy of reactants
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Is smaller than that of the products
Is greater than that of the products
Must be greater or smaller than that of the products
Is equal to that of the products
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Question # 7
Most of the reactions which give stable products are
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Endothermic
Exothermic
Isothermal
Non of these
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Question # 8
Neutralization of acid-base is
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Spontaneous
Exothermic
Non spontaneous
Both "a" and "c
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Question # 9
One kilo calorie is equal to
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4.184J
1000J
4184J
1kJ
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Question # 10
In order to determine ∆H (latt) of ionic compound which is correct relationship
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∆H latt. = ∆Hf - ∆Hx
∆H latt. = ∆Ha + ∆Hv
∆H latt. = ∆Hf + ∆Hx
∆H latt. = ∆Hf - ∆H sol.
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Question # 11
NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called
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Enthalpy of reaction
Enthalpy of Neutralisation
Enthalpy of formation
Enthalpy of combustion
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Question # 12
The values of ∆H for the process l(g)+e-1--------->
I-1(g) is:
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>0
<0
0
None
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Question # 13
One Joule is equivalent to
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4.184 cal.
0.4184cal.
1/2 cal.
1/4.184 cal
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Question # 14
The exothermic process is
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Evaporation
Sublimation
Respiration
Boiling
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Question # 15
The lattice energy of NaCl is
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787 j/ mole
790 kj/mol
780 kJ/ mol
-787 kI / mole
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Question # 16
The value of ∆V being very small. The term P∆V can be neglected for process involving
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Liquid and gas
Solids and gases
Liquid and solid
None of these
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Question # 17
The enthalpy of formation of a compound is
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Positive
Either positive or negative
Negative
None
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Question # 18
Which of the following has positive value of enthalpy
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Neutralisation
Atomization
combustion
All of the above
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Question # 19
Enthalpy of a reaction can be measured by
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Glass calorimeter
Barometer
Manometer
Thermometer
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Question # 20
Change in enthalpy (∆H) of a system can be calculated by
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∆H=∆E - PV
ΔH =ΔE +q
∆H = ∆E - q
∆Η = ΔΕ + P∆V
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