Thermo Chemistry test 4

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A test from chapter 7 i.e Thermo chemistry of Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. Which of the following statements is contrary to the first law of thermodynamics?

A) energy can neither be created nor destroyed
B) one form of energy can be transferred into an equivalent amount of other kinds of energy
C) in an adiabatic process, the work done is independent of its path
D) continuous production of mechanical work with out equivalent amount of heat is possible

2. The change in heat energy of a chemical reaction at constant temperature and pressure is called

A) enthalpy change
B) bond energy
C) heat of sublimation
D) internal energy change

3. For the reaction NaOH + HCl ® NaCl + H2O, the change in enthalpy is called as:

A) heat of reaction
B) heat of formation
C) heat of neutralization
D) heat of combustion

4. Calorie is equivalent to

A) 0.4184 J
B) 41.84 J
C) 4.184 J
D) 418.4 J

5. For a given process, the heat change at pressure (qp) and constant volume (qv) are related to each other as

A) qp = qv
B) qp < qv
C) qp > qv
D) qp =

6. The net heat change in a chemical reaction is same whether. It is brought about in two or more different ways in one or several steps. It is known as

A) Henry's law
B) Joule's principle
C) Hess's law
D) Lqw of conservation of energy

7. Enthalpy of neutralisation of all the strong acids and strong bases has the same value because

A) neutralisation leads to the formation of salt and H2O
B) strong acid and bases are ionic substances
C) acids always give rise to H+ ions and bases always furnish OH– ions
D) the net chemical change involve the combination of H+ and OH– ions to form water

8. If an endothermic reaction is allowed to take place very rapidly in the air. The temperature of the surrounding air

A) remains constant
B) increase
C) decrease
D) remain unchanged

9. In endothermic reactions, the heat content of the

A) products is more than that of reactants
B) reactants is more than that of products
C) both a and b
D) none

10. Hess’s law is also called

A) first law of thermodynamics
B) second law of thermodynamics
C) first law of thermochemistry
D) second law of thermochemistry