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#freezing point

2 public questions tagged with this topic.

Latent Heat and Phase Transitions

Which temperature scale uses 32∘ and 212∘ as the freezing and boiling points of water at standard pressure?

The Fahrenheit scale defines the freezing point of water as 32∘F and boiling point as 212∘F at standard pressure (Section 10.3). As per NCERT, applying relevant law/formula with correct units and sign convention leads to Fahrenheit. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.

Ref: NCBI Bookshelf, Ideal Gas Law: P1V1/T1 = P2V2/T2.

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Water and Mole Concept

Which of the following is NOT a colligative property?

Density is the correct choice because it does not accurately describe or belong to the category addressed in this question. In the context of Water and Mole Concept, the other options (Boiling point elevation, Freezing point depression, and Osmotic pressure) are all valid and well-established concepts. Density is either unrelated to the topic, describes a different biological process, or represents a common misconception. Questions framed as 'which is NOT' require students to identify the exception among otherwise correct statements, demanding comprehensive knowledge of the topic rather than recognition of a single fact.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2

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