Chemistry Test 25

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MCQ's chemistry for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.

1. In endothermic process the temperature of system
   1. Falls
   2. Rises
   3. Remains constant
   4. First increases then decreases
2. Spontaneous reactions are
   1. Reversible
   2. Non real
   3. Always endothermic
   4. unidirectional
3. Non spontaneous processes
   1. Are always in equilibrium
   2. Never reach to an end
   3. Move from equilibrium to non equilibrium state
   4. Move from non equilibrium state to equilibrium state
4. Non spontaneous reactions are
   1. Always exothermic
   2. Generally exothermic
   3. Generally endothermic
   4. Never be exothermic
5. In order to predict whether reactions is spontaneous or non spontaneous we should study
   1. Enthalpy of system
   2. State of the system
   3. Free energy change of system
   4. Heat change of system
6. Which of the following is incorrect to the first law of thermodynamics?
   1. Heat lost by system is equal to heat gained by surrounding and vice versa
   2. Energy can neither be created nor be destroyed but can be changed from one to another form
   3. Energy of the universe tends to be constant
   4. Energy of the universe tends to be maximum or minimum
7. Heat absorbed by gaseous system at constant pressure is equal
   1. Change in internal energy
   2. Pressure volume work
   3. Change in enthalpy
   4. None
8. A bomb calorimeter is used to determine the accurate enthalpy of
   1. Solution
   2. Neutralization
   3. Combustion
   4. atomization
9. In bomb calorimeter oxygen is provided with pressure of about
   1. 10 atm
   2. 20 atm
   3. 100 atm
   4. 200 atm
10. Which of the following is called Hess’s law of constant heat summation?
    1. First law of thermodynamics
    2. Second law of thermodynamics
    3. First law of thermo chemistry
    4. Second law of thermo chemistry

1. Rises
2. Unidirectional
3. Move from equilibrium to nom equilibrium state
4. Generally endothermic
5. Try yourself
6. Energy of the universe tends to be minimum or maximum
7. Change in enthalpy
8. Combustion
9. 20 atm
10. First law of thermodynamics