GK
BASIC GENERAL KNOWLEDGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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high pressure raises the boiling point of water
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it does not let the heat energy escape easily
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high pressure crushes the hard covering of rice grains
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it always lets the steam escape
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Detailed explanation-1: -Cooking is fast in pressure cooker just because the trapped steam increases the atmospheric pressure inside the cooker. At that pressure, boiling point of water is increased and this higher temperature cooks food faster.
Detailed explanation-2: -A pressure cooker is a sealed chamber that traps the steam generated as its contents are heated. As steam builds, pressure increases, driving the boiling point of water past 212°F. In general, this higher temperature shortens cooking times and, due to a lack of evaporation, extracts flavor more efficiently from foods.
Detailed explanation-3: -Thus, in a pressure cooker since the boiling point increases, the steam has greater thermal energy which it can transfer to the food and hence the cooking is faster. Therefore, the correct option is D) increases the boiling point.