Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

General Knowledge

Question:

Identify the INCORRECT pair with respect to the substances and their specific heat capacity (J kg-1K-1) at room temperature and atmospheric pressure.

Options:

Aluminium - 900.0

Water - 1200

Carbon - 506.5

Tungsten - 134.4

Correct Answer:

Water - 1200

Explanation:

The correct answer is option 2. Water - 1200.

The incorrect pair is Water-1200.

Here's why:

Aluminum \((900 J kg^{-1}K^{-1})\): This value is within the typical range for aluminum's specific heat capacity (around \(897 J kg^{-1}K^{-1}\)).

Carbon \((506.5 J kg^{-1}K^{-1})\): This value is close to the specific heat capacity of graphite, a common form of carbon (around \(859 J kg^{-1}K^{-1}\)).

Tungsten \((134.4 J kg^{-1}K^{-1})\): This value falls within the range for tungsten's specific heat capacity (around \(130 J kg^{-1}K^{-1}\)).

Water \((1200 J kg^{-1}K^{-1})\): The specific heat capacity of water at room temperature and atmospheric pressure is actually around \(4187 J kg^{-1}K^{-1}\). This is significantly higher than the listed value of \(1200 J kg^{-1}K^{-1}\).

Therefore, the specific heat capacity value provided for water is incorrect, making it the incorrect pair.