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Q. No.What is the heat of neutralization for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?
1.
-57.32 kJ/mol
2.
-13.7 kJ/mol
3.
-57.32 kJ/g
4.
-13.7 kJ/g
Subtopic: Calorimetry |
78%
Level 2: 60%+
Hints
Which of the following statements about exothermic reactions is true?
1. They absorb heat from the surroundings
2. They have a positive change in enthalpy \((\Delta \mathrm{H})\)
3. They release heat to the surroundings
4. They occur spontaneously at low temperatures
1. They absorb heat from the surroundings
2. They have a positive change in enthalpy \((\Delta \mathrm{H})\)
3. They release heat to the surroundings
4. They occur spontaneously at low temperatures
Subtopic: Calorimetry |
83%
Level 1: 80%+
Hints
Which of the following does not influence the heat of solution?
1. Temperature
2. Pressure
3. Concentration
4. Nature of solute and solvent
1. Temperature
2. Pressure
3. Concentration
4. Nature of solute and solvent
Subtopic: Calorimetry |
Level 3: 35%-60%
Hints
The heat of vaporization is the heat:
1. Absorbed when a solid changes to a liquid.
2. Released when a gas changes to a liquid.
3. Absorbed when a liquid changes to a gas.
4. Released when a liquid changes to a solid
1. Absorbed when a solid changes to a liquid.
2. Released when a gas changes to a liquid.
3. Absorbed when a liquid changes to a gas.
4. Released when a liquid changes to a solid
Subtopic: Calorimetry |
85%
Level 1: 80%+
Hints
Subtopic: Calorimetry |
85%
Level 1: 80%+
Hints
Hess's law states that:
| 1. | The heat evolved in a given process is equal to the heat absorbed in the reverse process. |
| 2. | The heat evolved or absorbed in a chemical process is the same regardless of the pathway taken. |
| 3. | The heat of reaction depends on the temperature of the reaction. |
| 4. | The heat of reaction is directly proportional to the concentration of the reactants. |
Subtopic: Calorimetry |
71%
Level 2: 60%+
Hints
Which of the following is NOT a type of calorimeter?
1. Bomb calorimeter
2. Coffee-cup calorimeter
3. Differential scanning calorimeter
4. Electrochemical calorimeter
1. Bomb calorimeter
2. Coffee-cup calorimeter
3. Differential scanning calorimeter
4. Electrochemical calorimeter
Subtopic: Calorimetry |
Level 3: 35%-60%
Hints
The heat capacity of a system is defined as:
| 1. | The heat required to raise the temperature of the system by 1 degree Celsius. |
| 2. | The heat released when the system undergoes a chemical reaction. |
| 3. | The heat absorbed when the system undergoes a chemical reaction. |
| 4. | The heat required to raise the temperature of the system by 1 Kelvin. |
Subtopic: Calorimetry |
70%
Level 2: 60%+
Hints
What is the color change observed during the titration of Mohr's salt with potassium permanganate?
1. From blue to colourless
2. From pink to colourless
3. From green to brown
4. From yellow to pink
1. From blue to colourless
2. From pink to colourless
3. From green to brown
4. From yellow to pink
Subtopic: The chemistry involved in the titrimetric exercises |
Level 4: Below 35%
Hints
Which of the following is a confirmatory test for the presence of \(\mathrm{Hg}^{ 2+}\) ions in salt analysis?
| 1. | Formation of yellow precipitate with sodium carbonate. |
| 2. | Formation of brown precipitate with hydrochloric acid. |
| 3. | Formation of white precipitate with ammonium hydroxide. |
| 4. | Formation of red precipitate with potassium iodide. |
Subtopic: Detection of Cations |
Level 3: 35%-60%
Hints
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