Official Answer Key & Detailed Solution
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Correct Answer: Option (C) — 1 and 3 only
Concept & Option Breakdown
Standard Reference VerifiedStatements 1 and 3 are correct, while Statement 2 is incorrect:
- Statement 1 is correct: The area of the vent hole affects the pressure equilibrium; pressure determines the boiling point and thus the maximum operating temperature.
- Statement 2 is incorrect: Increasing the flame temperature increases the rate of heating, but once the cooker reaches operating pressure, excess heat simply vents additional steam without raising the internal equilibrium temperature.
- Statement 3 is correct: The weight of the pressure regulator on the lid determines the threshold internal pressure required to lift the valve, which directly dictates the boiling temperature of water inside.
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