| 1 |
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
|
| 2 |
If an endothermic reaction is allowed to take place very rapidly i the air, the temperature fo the surrounding air. |
- A. Remains constant
- B. Increase
- C. Decrease
- D. Remain unchanged
|
| 3 |
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
|
| 4 |
What happens to the enthalpy change when the coeffficients of a chemical equation are douubled |
- A. It doubles
- B. It becomes half
- C. It does not change
- D. It cannot be predicted
|
| 5 |
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
|
| 6 |
One of the following statements about Born-Haber cycle is correct. Which is that statement |
- A. Born-Haber cycle is different from Hess's law
- B. The energy change in a cyclic process is not zero
- C. The lattice energy of the crystalline substances can be calculated easily
- D. Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously
|
| 7 |
The S.I. units for the molar heat capacity are |
- A. Joule Cm<sup>-3</sup>degree<sup>-1</sup>
- B. Joule deg<sup>-1</sup>atm<sup>-1</sup>
- C. Joule deg<sup>-1</sup>mol<sup>-1</sup>
- D. Joule deg<sup>-1</sup>kg<sup>-1</sup>
|
| 8 |
Which one of the following process is endothermic |
- A. condensation of steam
- B. Freezing of water
- C. electrolysis of water
- D. None of these
|
| 9 |
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. Increase a bit
|
| 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 known as |
- A. Henry's law
- B. Hess's law
- C. Joule's principle
- D. Law of conservation of energy
|