Chemistry - 9 Chapter - 10Chemical EnergeticsTest - 10

Chemistry - 9 Chapter - 10
Chemical Energetics
Test - 10

1. Hydrogen reacts with iodine only at low temperature and 53.08 kJ of heat energy is absorbed.

a) True
b) False

2. Water at 100oC will have same enthalpy as water at 25oC.

a) True
b) False

3. ?H is the enthalpy of reactants only.

a) True
b) False

4. During the combustion of natural gas ?H is �890.4 kJ. Therefore, it is an exothermic reaction.

a) False
b) True

5. Heat is evolved or absorbed only in chemical reaction and not in physical changes.

a) False
b) True

6. Freezing of liquid water into ice is an endothermic physical change.

a) True
b) False

7. Heat is always absorbed during neutralization reactions.

a) False
b) True

8. Formation of nitric oxide (NO) in air due to lightening is an endothermic change.

a) True
b) False

9. Nitrogen reacts with chlorine to form ammonia gas.

a) True
b) False

10. Oxidation of glucose in human body is an endothermic change.

a) True
b) False

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