| 1 |
A chemical change always involve |
- A. Absorption of heat
- B. Evolution of heat
- C. Either absorption or evolution of heat
- D. The liberation of heat and light energy
|
| 2 |
The enthalpy of combustion is |
- A. Positive
- B. Negative
- C. Either positive or negative
- D. No correlation
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| 3 |
For a given process, the heat chagnes of constant pressure and at constant volume are related to each other as. |
- A. qp= qv
- B. qp<qv
- C. qp>qv
- D. None of these
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| 4 |
The pressure of oxygen inside the bomb calorimeter is. |
- A. 100 atm
- B. 50 atm
- C. 25 atm
- D. 20 atm
|
| 5 |
Whenever a reaction is endothermic, then it means that |
- A. Heat is transferred from surrounding to the system
- B. Heat is transferred system to the surrounding
- C. Heat content of the product is greater than that of reactants
- D. Heat content of the reactants is greater than the products
|
| 6 |
A material or a collection of materials which is under study is called |
- A. State function
- B. Degree and joule
- C. Degree and ergs
- D. Calorie and joule
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| 7 |
Which of the following statement is contrary to the first law of thermodynamics |
- A. An equivalent amount of heart 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 without supplying an equivalent is amount of heat possible
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| 8 |
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
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| 9 |
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| 10 |
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 knnown as |
- A. Henry's law
- B. Hess's law
- C. Joule's principle
- D. Law of combustion
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