NEET Practice Questions (MCQs) with Answers & Solutions

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What are the two convenient fixed points used for calibrating temperature scales related to water?

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Explanation

The context mentions, 'The ice point and the steam point of water are two convenient fixed points and are known as the freezing and boiling points, respectively.'

On the Fahrenheit temperature scale, what are the values assigned to the ice point and the steam point, respectively?

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Explanation

The NCERT text specifies, 'The ice and steam point have values 32 °F and 212 °F, respectively, on the Fahrenheit temperature scale.'

Which of the following is the SI unit of temperature?

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Explanation

The text explicitly states, 'The SI unit of heat energy transferred is expressed in joule (J) while SI unit of temperature is Kelvin (K), and degree Celsius (°C) is a commonly used unit of temperature.'

What is the relationship between Celsius temperature ($t_C$) and Fahrenheit temperature ($t_F$)?

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Explanation

The summary section clearly states, 'The Celsius temperature ($t_C$) and the Fahrenheit temperature ($t_F$) are related by $t_F = (9/5)t_C + 32$'.

How is the Kelvin absolute temperature scale (T) related to the Celsius scale ($T_C$)?

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Explanation

The summary provides the relation: 'The Kelvin absolute temperature scale (T) has the same unit size as the Celsius scale ($T_C$), but differs in the origin: $T_C = T - 273.15$.' This means $T = T_C + 273.15$.

Which of the following best describes temperature?

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Explanation

The text defines temperature as 'Temperature is a relative measure, or indication of hotness or coldness.'

The term 'hot' and 'cold' are considered relative terms. What does this imply about our perception of temperature by touch?

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Explanation

The text states, 'Note that hot and cold are relative terms, like tall and short. We can perceive temperature by touch. However, this temperature sense is somewhat unreliable and its range is too limited to be useful for scientific purposes.'

What is the primary reason for heat transfer between a system and its surroundings when their temperatures are different?

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Explanation

The text explains, 'It means that when the temperature of body, ice-cold water or hot tea in this case, and its surrounding medium are different, heat transfer takes place between the system and the surrounding medium, until the body and the surrounding medium are at the same temperature.'

Which of the following describes the functional unit of the human kidney?

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Explanation

The NCERT text states: 'Each kidney has over a million tubular structures called nephrons. Nephron is the functional unit of kidney and has two portions – glomerulus and renal tubule.'

The Malpighian body or renal corpuscle is formed by which two structures?

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Explanation

According to the NCERT text: 'Glomerulus alongwith Bowman’s capsule, is called the malpighian body or renal corpuscle.'

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