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Heat and Mass Transfer
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When heat is transferred by molecular collision, it is referred to as heat transfer by

Answer & Solution
Correct Answer: Option B
Convection is the process of heat transfer by the bulk movement of molecules within fluids such as gases and liquids. The initial heat transfer between the object and the fluid takes place through conduction, but the bulk heat transfer happens due to the motion of the fluid
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11 Comments
Md. Zikrullah
Md. Zikrullah 6 months ago
Correct answer is conduction.
Because in conduction, heat flows from one molecule to another due to direct contact and collisions, without any bulk movement of the material.

And Convection involves bulk movement of fluid (liquid or gas).
Heat transfer in convection happens due to motion of the fluid, not just molecular collisions.
Prerna For
Prerna For 5 years ago
Correct ans is convection because in convection heat transfer through conduction as well as bulk movement of molecules.
Vinay Singh
Vinay Singh 6 years ago
Convection- heat transfer by motion of particles
Conduction- heat transfer by molecular collision
Actually convection involves conduction and advection both so convection can also be correct but the most appropriate option will be conduction.
Vinay Singh
Vinay Singh 6 years ago
Conduction is correct
Adodariya Shyam
Adodariya Shyam 6 years ago
Convection is correct answer. Because in convection, heat transfer by collision of molecular & in condition, heat transfer by lettice vibration.
Ravi Verma
Ravi Verma 6 years ago
conduction is the right answer.
Shreyas Jadhav
Shreyas Jadhav 7 years ago
Aur kon konse galat hai koi bata sakta kya???
Shreyas Jadhav
Shreyas Jadhav 7 years ago
Aur kon konse galat hai koi bata sakta kya???
Rajesh Singh
Rajesh Singh 7 years ago
it should be conduction.
Abhilash Reddy
Abhilash Reddy 7 years ago
in conducion molecular collision happens, in convection molecules carry the heat from one place to other so answer is A
Siddharth Prajapati
Siddharth Prajapati 8 years ago
its correct answer is conduction