The scenario describes ketchup being more viscous when cold and less viscous when warm, facilitating flow. A. Liquids become less viscous during high temperature. This is generally true for liquids like ketchup and explains why it flows better when warm. Correct. B. Kinetic energy of the molecules increases with temperature. This is a fundamental principle of physics. Increased thermal energy means increased kinetic energy of molecules. Correct. C. Liquid resistance to flow increases with increasing temperature. This is incorrect. Resistance to flow (viscosity) generally decreases with increasing temperature for liquids. D. Kinetic energy counteracts the intermolecular forces. Intermolecular forces cause resistance to flow (viscosity). Higher kinetic energy of molecules allows them to overcome these forces more easily, leading to reduced viscosity. Correct.Statements A, B, and D are correct and relevant to why heating ketchup makes it flow better.
On a cold day, during an early breakfast of bread with Ketchup, one would have noticed that the ketchup barely moves out of the bottle. A little warming of the Ketchup would solve the problem. Which of the following statement makes sense in the above context ?
Asked in TSPSC Group 1 Prelims 2022 · Topic: Heat and Thermodynamics (Calorimetry and Phase Changes (Specific Heat, Latent Heat))
Show answer
Answer: C. Liquid resistance to flow increases with increasing temperature.
More Physics questions
- Steam at 100°C is more effective in heating than water at the same temperature because
- Water at 273 K is less effective in cooling than ice at the same temperature. It is because :
- Latent heat corresponds to the change in heat at constant
- Which one of the following statements about the Principle of Calorimetry is correct ?
- Pure water freezes at a temperature—
- When ice melts, then the
- Which of the following produces more severe burns ?
- Consider the following statements: Steam at 100° C and boiling water at 100° C contain same amount of heat. Latent heat of fusion of ice is equal to the latent heat of vaporization of water. In an air-conditioned, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils. Which of these statements is/are correct?