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MDCAT Chemistry Chapter 7 Reaction Kinetics Online Test MCQs With Answers
Question # 1
Choose from the followings the correct statement about Born Haber cycle
Choose an answer
Born Haber cycle is different from Hess's law
The energy changes in a cyclic process is not zero
The lattice energy of crystalline substances can be calculated easily
None
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Question # 2
One of the best applications of Hess's law to calculate the lattice energy of ionic compound is
Choose an answer
Measurement of enthalpy change in a calorimeter
Studying of first law of thermodynamics
Measurement of a heat of formation of a compound
Born-Haber cycle
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Question # 3
The values of ∆H for the process l(g)+e-1--------->
I-1(g) is:
Choose an answer
>0
<0
0
None
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Question # 4
Change in enthalpy (∆H) of a system can be calculated by
Choose an answer
∆H=∆E - PV
ΔH =ΔE +q
∆H = ∆E - q
∆Η = ΔΕ + P∆V
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Question # 5
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 # 6
Born-Haber cycle is an application of
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Hess's law
1" law of thermodynamics
Avogadro's law
1law of thermochemistry
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Question # 7
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 # 8
The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of
Choose an answer
Fomation of CO2
Fusion ofC2H4
Combustion of C2H4
Vaporization of C2H2
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Question # 9
The enthalpy of formation of a compound is
Choose an answer
Positive
Either positive or negative
Negative
None
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Question # 10
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 # 11
Neutralization of acid-base is
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Spontaneous
Exothermic
Non spontaneous
Both "a" and "c
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Question # 12
Enthalpy of a reaction can be measured by
Choose an answer
Glass calorimeter
Barometer
Manometer
Thermometer
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Question # 13
One Joule is equivalent to
Choose an answer
4.184 cal.
0.4184cal.
1/2 cal.
1/4.184 cal
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Question # 14
If a reaction involves only solids and liquids, which of the following is true?
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ΔH = ΔE
ΔΗ =ΔΕ
ΔH>ΔΕ
AH =AE +nRT
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Question # 15
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 # 16
The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps.it is known as
Choose an answer
Henry's law
Hess's law
joule's law
Law of conservation of energy
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Question # 17
If internal energy of the system is increased
Choose an answer
Change in state of the system may occur
Temperature of the system may rise
Chemical reaction may take place
All of these
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Question # 18
How much heat is absorbed by 100 g of water when its temperature decreases from 25°C to 5°C? (heat capacity is 4.2 J/gK)
Choose an answer
84,000J
2000/4.2J
-2000/4.2j
-8400J
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Question # 19
Which of the following has positive value of enthalpy
Choose an answer
Neutralisation
Atomization
combustion
All of the above
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Question # 20
The exothermic process is
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Evaporation
Sublimation
Respiration
Boiling
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