Chemistry Mcq Questions For Class 11 Pdf Download Chapter 7 | Online Mcq Test For Class 11 Chemistry

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Chapter 7

Thermochemistry

1. Spontaneous reactions are:

  1. Reversible
  2. Irreversible
  3. Non irreversible
  4. None of these

2. The standard heat changes occur at:

  1. 25°C and 2 atm
  2. 298 K and 1 atm
  3. 25°C and 1 mm hg All Past P
  4. 273 K and 1 atm

3. H+ + OH → H2O the change in enthalpy for reaction is called:

  1. Heat of reaction
  2. heat of formation
  3. Heat of neutralization
  4. Heat of combustion

4. The net change in energy in a chemical reaction is same whether it takes place directly or indirectly. It is called:

  1. Henry’s law
  2. Charlie’s law
  3. Hess’s law
  4. Graham’s law

5. The enthalpy change when one mole of substance is completely burnt in excess of oxygen is called which one of following:

  1. Enthalpy of atomization
  2. Enthalpy of neutralization
  3. Enthalpy of Combustion
  4. Enthalpy of formation

6. Enthalpy change for the reaction: CH4(g) + 2O2(g) CO2(g) + 2H2O5 is called enthalpy of:

  1. Formation
  2. Combustion
  3. Neutralization
  4. Atomization

7. Standard enthalpies are measured at:

  1. 273 K
  2. 298K
  3. 373 K
  4. All of these

8. The exothermic process is:

  1. Evaporation
  2. Sublimation
  3. Respiration
  4. Boiling

9. A state function which describes together the internal energy and the product of pressure and volume is called:

  1. Enthalpy
  2. Internal energy
  3. Work
  4. Free energy

10. The total heat content of system is called:

  1. Entropy
  2. Enthalpy
  3. Temperature
  4. Internal energy

11. Whenever a reaction is exothermic, then it means that:

  1. The heat is transferred from surroundings to the system
  2. The heat content of the reactant is greater than product
  3. The heat content of the reactants is less than those of products
  4. The heat is transferred from system to the surroundings.

12. At constant volume qv is equal to:

  1. H
  2. E
  3. P
  4. V

13. The value of AH being very small, the term A (PV) can be neglected, for the process involving:

  1. Liquid and gas
  2. Liquid and solids
  3. Solids and gases
  4. None of these

14.  In a Bomb calorimeter, the reaction are carried out at constant:

  1. Pressure
  2. Work
  3. Volume
  4. None of these

15. Whenever a reaction is endothermic, than it means that:

  1. Heat is transferred from surrounding to the system
  2. Heat is transferred from system to the surrounding
  3. Heat content of the products is greater than those of the reactant
  4. Heat content of the reactants is greater than those of the products

16. The number of fundamental ways for transferring energy into or out of system is:

  1. One
  2. Two
  3. Three
  4. Four

17. Work is product of force and:

  1. Volume
  2. Time
  3. Displacement
  4. Pressure

18. The enthalpies of all elements in their standard states are which among of the following:

  1. Unity
  2. Zero
  3. Always positive
  4. Always Negative

19. Which one of the following is not a state function?

  1. Pressure
  2. Volume
  3. Temperature
  4. Heat

20. Born-Haber’s cycle is used to determine the which one among the following:

  1. Combustion energy
  2. Decomposition energy
  3. Lattice energy
  4. Formation energy

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