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Q. No.Which of the following is not involved in the titration of Mohr's salt (\(\mathrm{FeSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}\)) with potassium permanganate (\(\mathrm{KMnO}_4\))?
1.
Oxidation
2.
Reduction
3.
Precipitation
4.
Acid-base reaction
Subtopic: The chemistry involved in the titrimetric exercises |
Level 3: 35%-60%
Hints
Which acid is typically used for the preparation of a standard solution of KMnO4?
| 1. | Sulphuric acid | 2. | Hydrochloric acid |
| 3. | Phosphoric acid | 4. | Oxalic acid |
Subtopic: The chemistry involved in the titrimetric exercises |
51%
Level 3: 35%-60%
Hints
How is the volume of \(\mathrm{KMnO_4}\) solution determined during titration?
1. By measuring the mass of \(\mathrm{KMnO_4}\) crystals used
2. By monitoring the colour change of the solution
3. By titrating with a standard solution of oxalic acid
4. By measuring the pH of the solution
1. By measuring the mass of \(\mathrm{KMnO_4}\) crystals used
2. By monitoring the colour change of the solution
3. By titrating with a standard solution of oxalic acid
4. By measuring the pH of the solution
Subtopic: The chemistry involved in the titrimetric exercises |
Level 3: 35%-60%
Hints
What is the primary purpose of a calorimeter?
| 1. | To measure the mass of substances. |
| 2. | To enable free exchange for the reaction with the surroundings. |
| 3. | To prevent heat exchange with the surroundings. |
| 4. | To increase the temperature of the reactants. |
Subtopic: Calorimetry |
59%
Level 3: 35%-60%
Hints
Which of the following units is commonly used to express heat energy?
1. Joule (J)
2. Gram (g)
3. Kelvin (K)
4. Litre (L)
1. Joule (J)
2. Gram (g)
3. Kelvin (K)
4. Litre (L)
Subtopic: Calorimetry |
93%
Level 1: 80%+
Hints
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 |
82%
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
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