Question

Assertion : The properties of paramagnetic and ferromagnetic substance are not effected by heating.
Reason : As temperature rises, the alignment of molecular magnets gradually decreases.
A. If both Assertain and Reason are true and Reason is the correct explanation of Assertain
B. If both Assertain and Reason are true but Reason is not correct explantion of Assertain
C. If Assertion is true but Reason is false
D. If Assertion is false but Reason in true.

Answer 1

Correct Answer - C
The properties of substances is due to aligmet of molecules in it. When these substance ar eheated, molecules acquire kinetic energy. Some of the molecules get back to the closed chain arrangement (leading to zero resultant). So they lose their magnetic property. Hence the properties of paramagnetic and ferromagnetic substance are effected by heating.