Are these statements about the thermal conductivity true?
Statement 1: Thermal conductivity is an extrinsic property.
Statement 2: It involves in the bulk motion of the molecules during heat transfer.
a) True, False
b) True, True
c) False, True
d) False, False

Answer: d
Explanation: Thermal conductivity is the intrinsic property of the material. It refers to its ability to conduct heat. Heat transfer by conduction involves transfer of energy within a material without any motion of the molecules during heat transfer.