Question:
Highest thermal conductivity is of
Highest thermal conductivity is of
Show Hint
Thermal conductivity is generally higher in solids than in liquids or gases — solid ice conducts heat better than water or steam.
Updated On: Jun 21, 2025
- Solid ice
- Melting ice
- Water
- Steam
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Thermal conductivity is the property of a material to conduct heat. Among the given options, solid ice has the highest thermal conductivity.
Thermal conductivity comparison:
- Solid ice has a crystalline structure which allows better heat transfer through lattice vibrations (phonons).
- Water (liquid state) and steam (gaseous state) have disordered molecules, reducing thermal conductivity.
- Melting ice is in transition and generally conducts less effectively due to the presence of phase change.
Thus, solid ice conducts heat better than its liquid or gaseous forms.
Thermal conductivity comparison:
- Solid ice has a crystalline structure which allows better heat transfer through lattice vibrations (phonons).
- Water (liquid state) and steam (gaseous state) have disordered molecules, reducing thermal conductivity.
- Melting ice is in transition and generally conducts less effectively due to the presence of phase change.
Thus, solid ice conducts heat better than its liquid or gaseous forms.
Was this answer helpful?
0
0
Top Questions on Heat Transfer
- From a metallic wall at 100$^\circ$C, a metallic rod protrudes to the ambient air. The temperature at the tip will be minimum when the rod is made of:
- AP PGECET - 2025
- Mechanical Engineering
- Heat Transfer
- As the distance from the leading edge increases, the thermal boundary layer thickness:
- AP PGECET - 2025
- Mechanical Engineering
- Heat Transfer
- Provision of fins on a given heat transfer surface will be more, if there are:
- AP PGECET - 2025
- Mechanical Engineering
- Heat Transfer
- Nusselt number is the ratio of:
- AP PGECET - 2025
- Mechanical Engineering
- Heat Transfer
- Recuperators are more suitable than regenerators when:
- AP PGECET - 2025
- Nano Technology
- Heat Transfer
View More Questions
Questions Asked in AP PGECET exam
- Evaluation of the integral \( \int_{2}^{4} x^2 \, dx \) using the trapezoidal rule (with two equal segments) gives a value of ...........
- AP PGECET - 2025
- Calculus
- A machine produces 0, 1 or 2 defective items in a day with probabilities of \( \frac{1}{4}, \frac{1}{2}, \frac{1}{4} \) respectively. Then, the standard deviation of the number of defective items produced by the machine in a day is ...........
- AP PGECET - 2025
- Probability and Statistics
- Let \( A, B \) be two events and \( \overline{A} \) be the complement of \( A \). If \( P(\overline{A}) = 0.7 \), \( P(B) = 0.7 \), and \( P(B|A) = 0.5 \), then \( P(A \cup B) = \) ...........
- AP PGECET - 2025
- Probability and Statistics
- If the Laplace transform of a function \( f(t) \) is given by \( \frac{2s + 1}{(s + 1)(s + 2)} \), then \( f(0) \) is equal to ...........
- AP PGECET - 2025
- Laplace transforms
- If \( y(x) \) satisfies the differential equation \( x \frac{dy}{dx} + (x - y) = 0 \) subject to the condition \( y(1) = 0 \), then \( y(e) \) is ...........
- AP PGECET - 2025
- Differential Equations
View More Questions