- 1(current)
Q. No.The enthalpy of formation of all elements in their standard state is-
| 1. | Unity | 2. | Zero |
| 3. | Less than zero | 4. | Different for each element |
Subtopic: Thermodynamics' Properties and process |
82%
Level 1: 80%+
Hints
Links
The amount of heat needed to raise the temperature of 60.0 g of aluminium from 35°C to 55°C would be:
(Molar heat capacity of Al is \(24\) \(J\) \(\text{mol}^{- 1}\) \(K^{- 1}\))
| 1. | \(1 . 07\) \(J\) | 2. | \(1 . 07\) \(kJ\) |
| 3. | \(106 . 7\) \(kJ\) | 4. | \(100 . 7\) \(kJ\) |
Subtopic: Thermodynamics' Properties and process |
68%
Level 2: 60%+
Hints
Which among the following statements about open, closed, and isolated systems is correct?
| 1. | The presence of reacting species in a covered beaker represents an open system. |
| 2. | In a closed system, there is an exchange of both energy and matter between the system and its surroundings. |
| 3. | A system containing reactants in a closed vessel made of copper is an example of a closed system. |
| 4. | A system containing reactants in a thermos flask or any other closed, insulated vessel is an example of a closed system. |
Subtopic: Thermodynamics' Properties and process |
73%
Level 2: 60%+
Hints
Links
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.