1. Which of following has zero value for standard enthalpy of formation

a. O3
b. H2O
c. ZnO
d. none of these

a. O3

2. Calorie is equivalent to

a. 4.18J
b. 4.18kJ
c. 4.18MJ
d. none

a. 4.18J

3. Ethalphy of neutralization of all strong acids and strong bases has the same value due to

a. formation of salt and water always
b. formation of salt
c. complete ionization of acids and bases
d. combination of H+ and OH– to form water

d. combination of H+ and OH– to form wat

4. Total heat content of system is called

a. enthalpy
b. internal energy
c. heat
d. state function

a. enthalpy

5. Heat of ….. of a substance is always negative

a. formation
b. combustion
c. decomposition
d. solution

b. combustion

6. A ballon filled with oxygen is placed in a freezer. Identify system

a. ballon
b. oxygen
c. freezer
d. all

b. oxygen

7. A bomb clorimeter is used in …..clorimetery

a. constant volume
b. constant pressure
c. constant temperature
d. none

a. constant volume

8. Born haber cycle is used to determine the lattice energies of

a. molecular solids
b. ionic solids
c. covalent solids
d. metallic solids

b. ionic solids

9. q = delta H when

a. delta V = 0
b. delta P = 0
c. delta E = 0
d. none

b. delta P = 0

10. Enthalpy of combustion for C is -393.5kJ/mol C + O2 …….> CO2 delta H combustion = -393.5kJ/mol. Enthalpy of formation of CO2 would be

a. -393.5kJ/mol
b. +393.5kJ/mol
c. zero
d. cannot be predicted from given equation

a. -393.5kJ/mol

11. Which of following is not a state function of a system

a. thermal energy at constant pressure
b. enthalpy
c. Internal energy
d. work done

d. work done